void CCreateField::RenderQuad(const Vec3f & p1, const Vec3f & p2, const Vec3f & p3, const Vec3f & p4, int rec, Vec3f norm, RenderMaterial & mat) {
if(rec < 3) {
rec++;
Vec3f v[5] = {
p1 + (p3 - p1) * 0.5f,
p1 + (p4 - p1) * 0.5f,
p2 + (p3 - p2) * 0.5f,
p4 + (p3 - p4) * 0.5f,
p1 + (p2 - p1) * 0.5f,
};
float patchsize = 0.005f;
v[0].x += glm::sin(glm::radians((v[0].x - eSrc.x) * patchsize + fwrap)) * 5;
v[0].y += glm::sin(glm::radians((v[0].y - eSrc.y) * patchsize + fwrap)) * 5;
v[0].z += glm::sin(glm::radians((v[0].z - eSrc.z) * patchsize + fwrap)) * 5;
v[1].x += glm::sin(glm::radians((v[1].x - eSrc.x) * patchsize + fwrap)) * 5;
v[1].y += glm::sin(glm::radians((v[1].y - eSrc.y) * patchsize + fwrap)) * 5;
v[1].z += glm::sin(glm::radians((v[1].z - eSrc.z) * patchsize + fwrap)) * 5;
v[2].x += glm::sin(glm::radians((v[2].x - eSrc.x) * patchsize + fwrap)) * 5;
v[2].y += glm::sin(glm::radians((v[2].y - eSrc.y) * patchsize + fwrap)) * 5;
v[2].z += glm::sin(glm::radians((v[2].z - eSrc.z) * patchsize + fwrap)) * 5;
v[3].x += glm::sin(glm::radians((v[3].x - eSrc.x) * patchsize + fwrap)) * 5;
v[3].y += glm::sin(glm::radians((v[3].y - eSrc.y) * patchsize + fwrap)) * 5;
v[3].z += glm::sin(glm::radians((v[3].z - eSrc.z) * patchsize + fwrap)) * 5;
v[4].x += glm::sin(glm::radians((v[4].x - eSrc.x) * patchsize + fwrap)) * 5;
v[4].y += glm::sin(glm::radians((v[4].y - eSrc.y) * patchsize + fwrap)) * 5;
v[4].z += glm::sin(glm::radians((v[4].z - eSrc.z) * patchsize + fwrap)) * 5;
RenderQuad(p1, v[4], v[0], v[1], rec, norm, mat);
RenderQuad(v[4], p2, v[2], v[0], rec, norm, mat);
RenderQuad(v[0], v[2], p3, v[3], rec, norm, mat);
RenderQuad(v[1], v[0], v[3], p4, rec, norm, mat);
} else if(rec == 3) {
float zab = glm::sin(glm::radians(ft));
TexturedQuad q;
q.v[0].uv.x = 0 + zab;
q.v[0].uv.y = 0 + zab;
q.v[1].uv.x = 1 + zab;
q.v[1].uv.y = 0 + zab;
q.v[2].uv.x = 1 + zab;
q.v[2].uv.y = 1 + zab;
q.v[3].uv.x = 0 + zab;
q.v[3].uv.y = 1 + zab;
q.v[1].color = q.v[2].color = Color3f(falpha * .3f + Random::getf(0.f, .025f), 0.f, falpha * .5f + Random::getf(0.f, .025f)).toRGB();
q.v[0].color = q.v[3].color = Color3f(falpha * .3f + Random::getf(0.f, .025f), 0.f, falpha * .5f + Random::getf(0.f, .025f)).toRGB();
q.v[0].p = p1;
q.v[1].p = p2;
q.v[2].p = p3;
q.v[3].p = p4;
drawQuadRTP(mat, q);
}
}
void DrawScene()
{
BeginScene(1);
ImageToScreen(pimage_bg,0,0);
RenderQuad(pimage_box,0,0,0,0,70,185,1,1,0,maskbox);
RenderQuad(pimage_box,0,0,0,0,70,5,1,1,0,maskbox);
DrawImage(pimage_icon[0],0,0,0,0,-20,-37,128,128);
DrawImage(pimage_icon[1],0,0,0,0,-20,143,128,128);
ImageToScreen(pimage_text,0,0);
EndScene();
}
void DrawScene()
{
BeginScene(1);
RenderQuad(p_logo,0,0,0,0,(480-p_logo->w)/2,(272-p_logo->h)/2,1,1,0,MAKE_RGBA_8888(255,255,255,40));
mParticleSys->Render();
EndScene();
}
void RenderThread::RenderFrame()
{
GS_RuntimeInfo runtime_info;
m_pEmulator->GetRuntimeInfo(runtime_info);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
switch (runtime_info.screen_height)
{
case GS_RESOLUTION_GG_HEIGHT:
glBindTexture(GL_TEXTURE_2D, m_GBTexture[0]);
break;
case GS_RESOLUTION_SMS_HEIGHT:
glBindTexture(GL_TEXTURE_2D, m_GBTexture[1]);
break;
case GS_RESOLUTION_SMS_HEIGHT_EXTENDED:
glBindTexture(GL_TEXTURE_2D, m_GBTexture[2]);
break;
}
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, runtime_info.screen_width, runtime_info.screen_height,
GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid*) m_pFrameBuffer);
if (m_bFiltering)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
else
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
RenderQuad(m_iWidth, m_iHeight, false);
}
void RenderLine2D(Shader *sh, Primitive prim, const float3 &v1, const float3 &v2, float thickness)
{
auto v = (v2 - v1) / 2;
auto len = length(v);
auto vnorm = v / len;
auto trans = translation(v1 + v) *
rotationZ(vnorm.xy()) *
float4x4(float4(len, thickness / 2, 1, 1));
RenderQuad(sh, prim, true, trans);
}
void PezRender(GLuint windowFbo)
{
glBindFramebuffer(GL_FRAMEBUFFER, OffscreenFbo);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
RenderBuddha();
glBindFramebuffer(GL_FRAMEBUFFER, windowFbo);
glClearColor(1, 1, 1, 1);
glClear(GL_COLOR_BUFFER_BIT);
RenderQuad();
}
void RenderThread::RenderMixFrames()
{
glBindFramebuffer(GL_FRAMEBUFFER, m_AccumulationFramebuffer);
glBindTexture(GL_TEXTURE_2D, m_GBTexture);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, GAMEBOY_WIDTH, GAMEBOY_HEIGHT,
GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid*) m_pFrameBuffer);
float alpha = kMixFrameAlpha;
if (m_bFirstFrame)
{
m_bFirstFrame = false;
alpha = 1.0f;
}
static bool round_error = false;
float round_color = 1.0f - (round_error ? 0.03f : 0.0f);
round_error = !round_error;
glEnable(GL_BLEND);
glColor4f(round_color, round_color, round_color, alpha);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
RenderQuad(GAMEBOY_WIDTH, GAMEBOY_HEIGHT, false);
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
glDisable(GL_BLEND);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glBindTexture(GL_TEXTURE_2D, m_AccumulationTexture);
if (m_bFiltering)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
else
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
RenderQuad(m_iWidth, m_iHeight, true);
}
void TileLayer::Render(float x, float y, float w, float h)
{
IRenderer& rRenderer = Renderer::Instance();
// Do alpha blending?
if ( m_pPrivData->bAlphaBlending )
rRenderer.SetAlphaBlending(true);
// Set rendering color
rRenderer.SetColor(m_pPrivData->color);
// Do we rotate?
if ( m_pPrivData->rotAngle != 0 )
{
float xTileCenterOffset = (w/2.0f);
float yTileCenterOffset = (h/2.0f);
rRenderer.PushMatrix();
rRenderer.Translate(x+xTileCenterOffset, y+yTileCenterOffset);
rRenderer.Rotate(m_pPrivData->rotAngle);
RenderQuad(m_pPrivData->texId, -xTileCenterOffset, -yTileCenterOffset, w, h);
rRenderer.PopMatrix();
}
else
{
// Render texture onto a quad
RenderQuad(m_pPrivData->texId, x, y, w, h);
}
// Restore color
rRenderer.SetColor(Color3F::White());
// Restore alpha blending state
if ( m_pPrivData->bAlphaBlending )
rRenderer.SetAlphaBlending(false);
}
void RenderLine3D(Shader *sh, const float3 &v1, const float3 &v2, const float3 &/*campos*/, float thickness)
{
glDisable(GL_CULL_FACE); // An exception in 3d mode.
// FIXME: need to rotate the line also to make it face the camera.
//auto camvec = normalize(campos - (v1 + v2) / 2);
auto v = v2 - v1;
auto vq = quatfromtwovectors(normalize(v), float3_x);
//auto sq = quatfromtwovectors(camvec, float3_z);
auto trans = translation((v1 + v2) / 2) *
float3x3to4x4(rotation(vq)) * // FIXME: cheaper?
float4x4(float4(length(v) / 2, thickness, 1, 1));
RenderQuad(sh, PRIM_FAN, true, trans);
glEnable(GL_CULL_FACE);
}
static void DrawFps()
{
glPushMatrix();
glLoadIdentity();
SetOrthographicProjection();
glColor3f(0.0f, 0.0f, 0.0f);
RenderQuad(25, 6, 50, 12);
glColor3f(1.0f, 1.0f, 1.0f);
RenderBitmapString(5, 10, GLUT_BITMAP_TIMES_ROMAN_10, FpsString);
glPopMatrix();
RestorePerspectiveProjection();
}
void RenderScene()
{
glClear(GL_COLOR_BUFFER_BIT);
//glColor3f(0.0f, 0.0f, 1.0f);
glPushMatrix();
/*glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, cube);
glDrawElements(GL_QUADS, 24, GL_UNSIGNED_BYTE, index);
glDisableClientState(GL_VERTEX_ARRAY);*/
RenderQuad();
glPopMatrix();
glutSwapBuffers();
}
VOID Render()
{
SetupMatrix() ;
g_ModelViewCamera->OnFrameMove();
g_pd3dDevice->GetRenderTarget(0, &g_pOldRenderTarget) ;
g_pd3dDevice->SetRenderTarget(0, g_pRenderSurface) ;
g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0xff0000ff, 1.0f, 0 );
// Begin the scene
if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
{
// Without this line, the teapot won't show up, what's the inner stuff of SetTexture?
g_pd3dDevice->SetTexture(0, NULL) ;
// Disable lighting, since we didn't specify color for vertex
g_pd3dDevice->SetRenderState( D3DRS_LIGHTING , FALSE );
g_pd3dDevice->SetRenderState(D3DRS_FILLMODE, D3DFILL_WIREFRAME) ;
g_pTeapotMesh->DrawSubset(0) ;
// End the scene
g_pd3dDevice->EndScene();
}
g_pd3dDevice->SetRenderTarget(0, g_pOldRenderTarget) ;
g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0xff00ff00, 1.0f, 0 );
// Begin the scene
if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
{
g_pd3dDevice->SetRenderState(D3DRS_FILLMODE, D3DFILL_SOLID) ;
// Render texture
RenderQuad() ;
// End the scene
g_pd3dDevice->EndScene();
}
// Present the back-buffer contents to the display
g_pd3dDevice->Present( NULL, NULL, NULL, NULL );
}
void RenderThread::RenderFrame()
{
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glBindTexture(GL_TEXTURE_2D, m_GBTexture);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, GAMEBOY_WIDTH, GAMEBOY_HEIGHT,
GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid*) m_pFrameBuffer);
if (m_bFiltering)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
else
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
RenderQuad(m_iWidth, m_iHeight, false);
}
VOID Render()
{
SetupMatrix() ;
g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0xff000000, 1.0f, 0 );
// Begin the scene
if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
{
RenderQuad() ;
// End the scene
g_pd3dDevice->EndScene();
}
// Present the back-buffer contents to the display
g_pd3dDevice->Present( NULL, NULL, NULL, NULL );
}
void CMaterialWave::Render(SMaterialRenderData* Data)
{
GLint tex0 = GetScreenTexture();
glUseProgram(CShader::GetShader(ST_WAVE)->GetProgram());
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, tex0);
glUniform1i(CShader::GetShader(ST_WAVE)->GetUnivormLocation(SUL_TEXTURE0), 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_gTexture);
glUniform1i(CShader::GetShader(ST_WAVE)->GetUnivormLocation(SUL_TEXTURE1), 1);
// glUniform1fv(CShader::GetShader(ST_WAVE)->GetUnivormLocation(SUL_FLOATV), 5, Data->Params);
// glUniformMatrix4fv(CShader::GetShader(ST_WAVE)->GetUnivormLocation(SUL_TEXTURE1), 1, GL_FALSE, invertTemp.m);
RenderQuad();
}
void IMaterial::RenderFrameBuffer()
{
glBindTexture(GL_TEXTURE_2D, m_gMainTexFrameBuffer);
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, 640, 960, 0);
glBindFramebuffer(GL_FRAMEBUFFER, Globals::GetDefaultFramebuffer());
glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUseProgram(CShader::GetShader(ST_FRAME)->GetProgram());
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_gMainTexFrameBuffer);
glUniform1i(CShader::GetShader(ST_FRAME)->GetUnivormLocation(SUL_TEXTURE0), 0);
RenderQuad();
glBindFramebuffer(GL_FRAMEBUFFER, m_gFB);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
void CAsteroid::Render()
{
int frame = (int) (4.5f * -m_fTemperatureTime / m_fTempTime) + 4;
m_pImage->SetFrame(frame);
if ( m_fInvincibleTime > 0.0f )
{
SDL_Rect target;
target = m_pExplosionParticle->GetSize();
target.w += target.w;
target.h += target.h;
target.x = (int)GetX() - (target.w / 2);
target.y = (int)GetY() - (target.h / 2);
RenderQuad( target, m_pExplosionParticle, 0, 1 );
}
else
{
CBaseObject::Render();
}
}
void OpenGLRenderer::RenderPrimitive(PrimitiveType primitive)
{
switch (primitive)
{
case AbstractRenderer::Point:
RenderPoint();
break;
case AbstractRenderer::Line:
RenderLine();
break;
case AbstractRenderer::Triangle:
RenderTriangle();
break;
case AbstractRenderer::Quad:
RenderQuad();
break;
default:
break;
}
}
VOID Render(float timeDelta)
{
SetupMatrix() ;
UpdateTextureCoordinates(timeDelta) ;
// Clear the back-buffer to a RED color
g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0xff568800, 1.0f, 0 );
// Begin the scene
if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
{
RenderQuad() ;
// End the scene
g_pd3dDevice->EndScene();
}
// Present the back-buffer contents to the display
g_pd3dDevice->Present( NULL, NULL, NULL, NULL );
}
// The MAIN function, from here we start our application and run our Game loop
int main()
{
// Init GLFW
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", nullptr, nullptr); // Windowed
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, mouse_callback);
glfwSetScrollCallback(window, scroll_callback);
// Options
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// Initialize GLEW to setup the OpenGL Function pointers
glewExperimental = GL_TRUE;
glewInit();
// Define the viewport dimensions
int width, height;
glfwGetFramebufferSize(window, &width, &height);
glViewport(0, 0, width, height);
// Setup some OpenGL options
glEnable(GL_DEPTH_TEST);
// Setup and compile our shaders
Shader shader("bloom.vs", "bloom.frag");
Shader shaderLight("bloom.vs", "light_box.frag");
Shader shaderBlur("blur.vs", "blur.frag");
Shader shaderBloomFinal("bloom_final.vs", "bloom_final.frag");
// Set samplers
shaderBloomFinal.Use();
glUniform1i(glGetUniformLocation(shaderBloomFinal.Program, "scene"), 0);
glUniform1i(glGetUniformLocation(shaderBloomFinal.Program, "bloomBlur"), 1);
// Light sources
// - Positions
std::vector<glm::vec3> lightPositions;
lightPositions.push_back(glm::vec3(0.0f, 0.5f, 1.5f)); // back light
lightPositions.push_back(glm::vec3(-4.0f, 0.5f, -3.0f));
lightPositions.push_back(glm::vec3(3.0f, 0.5f, 1.0f));
lightPositions.push_back(glm::vec3(-.8f, 2.4f, -1.0f));
// - Colors
std::vector<glm::vec3> lightColors;
lightColors.push_back(glm::vec3(5.0f, 5.0f, 5.0f));
lightColors.push_back(glm::vec3(5.5f, 0.0f, 0.0f));
lightColors.push_back(glm::vec3(0.0f, 0.0f, 15.0f));
lightColors.push_back(glm::vec3(0.0f, 1.5f, 0.0f));
// Load textures
GLuint woodTexture = loadTexture(FileSystem::getPath("resources/textures/wood.png").c_str());
GLuint containerTexture = loadTexture(FileSystem::getPath("resources/textures/container2.png").c_str());
// Set up floating point framebuffer to render scene to
GLuint hdrFBO;
glGenFramebuffers(1, &hdrFBO);
glBindFramebuffer(GL_FRAMEBUFFER, hdrFBO);
// - Create 2 floating point color buffers (1 for normal rendering, other for brightness treshold values)
GLuint colorBuffers[2];
glGenTextures(2, colorBuffers);
for (GLuint i = 0; i < 2; i++)
{
glBindTexture(GL_TEXTURE_2D, colorBuffers[i]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); // We clamp to the edge as the blur filter would otherwise sample repeated texture values!
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// attach texture to framebuffer
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, GL_TEXTURE_2D, colorBuffers[i], 0);
}
// - Create and attach depth buffer (renderbuffer)
GLuint rboDepth;
glGenRenderbuffers(1, &rboDepth);
glBindRenderbuffer(GL_RENDERBUFFER, rboDepth);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, SCR_WIDTH, SCR_HEIGHT);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboDepth);
// - Tell OpenGL which color attachments we'll use (of this framebuffer) for rendering
GLuint attachments[2] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
glDrawBuffers(2, attachments);
// - Finally check if framebuffer is complete
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
std::cout << "Framebuffer not complete!" << std::endl;
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// Ping pong framebuffer for blurring
GLuint pingpongFBO[2];
GLuint pingpongColorbuffers[2];
glGenFramebuffers(2, pingpongFBO);
glGenTextures(2, pingpongColorbuffers);
for (GLuint i = 0; i < 2; i++)
{
glBindFramebuffer(GL_FRAMEBUFFER, pingpongFBO[i]);
glBindTexture(GL_TEXTURE_2D, pingpongColorbuffers[i]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); // We clamp to the edge as the blur filter would otherwise sample repeated texture values!
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, pingpongColorbuffers[i], 0);
// Also check if framebuffers are complete (no need for depth buffer)
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
std::cout << "Framebuffer not complete!" << std::endl;
}
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Set frame time
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
// Check and call events
glfwPollEvents();
Do_Movement();
// 1. Render scene into floating point framebuffer
glBindFramebuffer(GL_FRAMEBUFFER, hdrFBO);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glm::mat4 projection = glm::perspective(camera.Zoom, (GLfloat)SCR_WIDTH / (GLfloat)SCR_HEIGHT, 0.1f, 100.0f);
glm::mat4 view = camera.GetViewMatrix();
glm::mat4 model;
shader.Use();
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, woodTexture);
// - set lighting uniforms
for (GLuint i = 0; i < lightPositions.size(); i++)
{
glUniform3fv(glGetUniformLocation(shader.Program, ("lights[" + std::to_string(i) + "].Position").c_str()), 1, &lightPositions[i][0]);
glUniform3fv(glGetUniformLocation(shader.Program, ("lights[" + std::to_string(i) + "].Color").c_str()), 1, &lightColors[i][0]);
}
glUniform3fv(glGetUniformLocation(shader.Program, "viewPos"), 1, &camera.Position[0]);
// - create one large cube that acts as the floor
model = glm::mat4();
model = glm::translate(model, glm::vec3(0.0f, -1.0f, 0.0));
model = glm::scale(model, glm::vec3(25.0f, 1.0f, 25.0f));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
RenderCube();
// - then create multiple cubes as the scenery
glBindTexture(GL_TEXTURE_2D, containerTexture);
model = glm::mat4();
model = glm::translate(model, glm::vec3(0.0f, 1.5f, 0.0));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
RenderCube();
model = glm::mat4();
model = glm::translate(model, glm::vec3(2.0f, 0.0f, 1.0));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
RenderCube();
model = glm::mat4();
model = glm::translate(model, glm::vec3(-1.0f, -1.0f, 2.0));
model = glm::rotate(model, 60.0f, glm::normalize(glm::vec3(1.0, 0.0, 1.0)));
model = glm::scale(model, glm::vec3(2.0));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
RenderCube();
model = glm::mat4();
model = glm::translate(model, glm::vec3(0.0f, 2.7f, 4.0));
model = glm::rotate(model, 23.0f, glm::normalize(glm::vec3(1.0, 0.0, 1.0)));
model = glm::scale(model, glm::vec3(2.5));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
RenderCube();
model = glm::mat4();
model = glm::translate(model, glm::vec3(-2.0f, 1.0f, -3.0));
model = glm::rotate(model, 124.0f, glm::normalize(glm::vec3(1.0, 0.0, 1.0)));
model = glm::scale(model, glm::vec3(2.0));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
RenderCube();
RenderCube();
model = glm::mat4();
model = glm::translate(model, glm::vec3(-3.0f, 0.0f, 0.0));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
RenderCube();
// - finally show all the light sources as bright cubes
shaderLight.Use();
glUniformMatrix4fv(glGetUniformLocation(shaderLight.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
glUniformMatrix4fv(glGetUniformLocation(shaderLight.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
for (GLuint i = 0; i < lightPositions.size(); i++)
{
model = glm::mat4();
model = glm::translate(model, glm::vec3(lightPositions[i]));
model = glm::scale(model, glm::vec3(0.5f));
glUniformMatrix4fv(glGetUniformLocation(shaderLight.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
glUniform3fv(glGetUniformLocation(shaderLight.Program, "lightColor"), 1, &lightColors[i][0]);
RenderCube();
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// 2. Blur bright fragments w/ two-pass Gaussian Blur
GLboolean horizontal = true, first_iteration = true;
GLuint amount = 10;
shaderBlur.Use();
for (GLuint i = 0; i < amount; i++)
{
glBindFramebuffer(GL_FRAMEBUFFER, pingpongFBO[horizontal]);
glUniform1i(glGetUniformLocation(shaderBlur.Program, "horizontal"), horizontal);
glBindTexture(GL_TEXTURE_2D, first_iteration ? colorBuffers[1] : pingpongColorbuffers[!horizontal]); // bind texture of other framebuffer (or scene if first iteration)
RenderQuad();
horizontal = !horizontal;
if (first_iteration)
first_iteration = false;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// 2. Now render floating point color buffer to 2D quad and tonemap HDR colors to default framebuffer's (clamped) color range
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
shaderBloomFinal.Use();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, colorBuffers[0]);
//glBindTexture(GL_TEXTURE_2D, pingpongColorbuffers[!horizontal]);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, pingpongColorbuffers[!horizontal]);
glUniform1i(glGetUniformLocation(shaderBloomFinal.Program, "bloom"), bloom);
glUniform1f(glGetUniformLocation(shaderBloomFinal.Program, "exposure"), exposure);
RenderQuad();
// Swap the buffers
glfwSwapBuffers(window);
}
glfwTerminate();
return 0;
}
void CCreateField::RenderSubDivFace(Vec3f * b, Vec3f * t, int b1, int b2, int t1, int t2, RenderMaterial & mat) {
Vec3f norm = (b[b1] + b[b2] + t[t1] + t[t2]) * 0.25f - eSrc;
norm = glm::normalize(norm);
RenderQuad(b[b1], b[b2], t[t1], t[t2], 1, norm, mat);
}
// The MAIN function, from here we start our application and run our Game loop
int main()
{
// Init GLFW
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", nullptr, nullptr); // Windowed
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, mouse_callback);
glfwSetScrollCallback(window, scroll_callback);
// Options
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// Initialize GLEW to setup the OpenGL Function pointers
glewExperimental = GL_TRUE;
glewInit();
// Define the viewport dimensions
glViewport(0, 0, SCR_WIDTH, SCR_HEIGHT);
// Setup some OpenGL options
glEnable(GL_DEPTH_TEST);
// Setup and compile our shaders
Shader shaderGeometryPass("g_buffer.vs", "g_buffer.frag");
Shader shaderLightingPass("deferred_shading.vs", "deferred_shading.frag");
Shader shaderLightBox("deferred_light_box.vs", "deferred_light_box.frag");
// Set samplers
shaderLightingPass.Use();
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gPosition"), 0);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gNormal"), 1);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gAlbedoSpec"), 2);
// Models
Model cyborg(FileSystem::getPath("resources/objects/nanosuit/nanosuit.obj").c_str());
std::vector<glm::vec3> objectPositions;
objectPositions.push_back(glm::vec3(-3.0, -3.0, -3.0));
objectPositions.push_back(glm::vec3(0.0, -3.0, -3.0));
objectPositions.push_back(glm::vec3(3.0, -3.0, -3.0));
objectPositions.push_back(glm::vec3(-3.0, -3.0, 0.0));
objectPositions.push_back(glm::vec3(0.0, -3.0, 0.0));
objectPositions.push_back(glm::vec3(3.0, -3.0, 0.0));
objectPositions.push_back(glm::vec3(-3.0, -3.0, 3.0));
objectPositions.push_back(glm::vec3(0.0, -3.0, 3.0));
objectPositions.push_back(glm::vec3(3.0, -3.0, 3.0));
// - Colors
const GLuint NR_LIGHTS = 32;
std::vector<glm::vec3> lightPositions;
std::vector<glm::vec3> lightColors;
srand(13);
for (GLuint i = 0; i < NR_LIGHTS; i++)
{
// Calculate slightly random offsets
GLfloat xPos = ((rand() % 100) / 100.0) * 6.0 - 3.0;
GLfloat yPos = ((rand() % 100) / 100.0) * 6.0 - 4.0;
GLfloat zPos = ((rand() % 100) / 100.0) * 6.0 - 3.0;
lightPositions.push_back(glm::vec3(xPos, yPos, zPos));
// Also calculate random color
GLfloat rColor = ((rand() % 100) / 200.0f) + 0.5; // Between 0.5 and 1.0
GLfloat gColor = ((rand() % 100) / 200.0f) + 0.5; // Between 0.5 and 1.0
GLfloat bColor = ((rand() % 100) / 200.0f) + 0.5; // Between 0.5 and 1.0
lightColors.push_back(glm::vec3(rColor, gColor, bColor));
}
// Set up G-Buffer
// 3 textures:
// 1. Positions (RGB)
// 2. Color (RGB) + Specular (A)
// 3. Normals (RGB)
GLuint gBuffer;
glGenFramebuffers(1, &gBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, gBuffer);
GLuint gPosition, gNormal, gAlbedoSpec;
// - Position color buffer
glGenTextures(1, &gPosition);
glBindTexture(GL_TEXTURE_2D, gPosition);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gPosition, 0);
// - Normal color buffer
glGenTextures(1, &gNormal);
glBindTexture(GL_TEXTURE_2D, gNormal);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, gNormal, 0);
// - Color + Specular color buffer
glGenTextures(1, &gAlbedoSpec);
glBindTexture(GL_TEXTURE_2D, gAlbedoSpec);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, gAlbedoSpec, 0);
// - Tell OpenGL which color attachments we'll use (of this framebuffer) for rendering
GLuint attachments[3] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2 };
glDrawBuffers(3, attachments);
// - Create and attach depth buffer (renderbuffer)
GLuint rboDepth;
glGenRenderbuffers(1, &rboDepth);
glBindRenderbuffer(GL_RENDERBUFFER, rboDepth);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, SCR_WIDTH, SCR_HEIGHT);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboDepth);
// - Finally check if framebuffer is complete
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
std::cout << "Framebuffer not complete!" << std::endl;
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Set frame time
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
// Check and call events
glfwPollEvents();
Do_Movement();
glPolygonMode(GL_FRONT_AND_BACK, wireframe ? GL_LINE : GL_FILL);
// 1. Geometry Pass: render scene's geometry/color data into gbuffer
glBindFramebuffer(GL_FRAMEBUFFER, gBuffer);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glm::mat4 projection = glm::perspective(camera.Zoom, (GLfloat)SCR_WIDTH / (GLfloat)SCR_HEIGHT, 0.1f, 100.0f);
glm::mat4 view = camera.GetViewMatrix();
glm::mat4 model;
shaderGeometryPass.Use();
glUniformMatrix4fv(glGetUniformLocation(shaderGeometryPass.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
glUniformMatrix4fv(glGetUniformLocation(shaderGeometryPass.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
for (GLuint i = 0; i < objectPositions.size(); i++)
{
model = glm::mat4();
model = glm::translate(model, objectPositions[i]);
model = glm::scale(model, glm::vec3(0.25f));
glUniformMatrix4fv(glGetUniformLocation(shaderGeometryPass.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
cyborg.Draw(shaderGeometryPass);
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
// 2. Lighting Pass: calculate lighting by iterating over a screen filled quad pixel-by-pixel using the gbuffer's content.
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
shaderLightingPass.Use();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, gPosition);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, gNormal);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, gAlbedoSpec);
// Also send light relevant uniforms
for (GLuint i = 0; i < lightPositions.size(); i++)
{
glUniform3fv(glGetUniformLocation(shaderLightingPass.Program, ("lights[" + std::to_string(i) + "].Position").c_str()), 1, &lightPositions[i][0]);
glUniform3fv(glGetUniformLocation(shaderLightingPass.Program, ("lights[" + std::to_string(i) + "].Color").c_str()), 1, &lightColors[i][0]);
// Update attenuation parameters and calculate radius
const GLfloat constant = 1.0; // Note that we don't send this to the shader, we assume it is always 1.0 (in our case)
const GLfloat linear = 0.7;
const GLfloat quadratic = 1.8;
glUniform1f(glGetUniformLocation(shaderLightingPass.Program, ("lights[" + std::to_string(i) + "].Linear").c_str()), linear);
glUniform1f(glGetUniformLocation(shaderLightingPass.Program, ("lights[" + std::to_string(i) + "].Quadratic").c_str()), quadratic);
// Then calculate radius of light volume/sphere
const GLfloat lightThreshold = 5.0; // 5 / 256
const GLfloat maxBrightness = std::fmaxf(std::fmaxf(lightColors[i].r, lightColors[i].g), lightColors[i].b);
GLfloat radius = (-linear + static_cast<float>(std::sqrt(linear * linear - 4 * quadratic * (constant - (256.0 / lightThreshold) * maxBrightness)))) / (2 * quadratic);
glUniform1f(glGetUniformLocation(shaderLightingPass.Program, ("lights[" + std::to_string(i) + "].Radius").c_str()), radius);
}
glUniform3fv(glGetUniformLocation(shaderLightingPass.Program, "viewPos"), 1, &camera.Position[0]);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "draw_mode"), draw_mode);
RenderQuad();
// 2.5. Copy content of geometry's depth buffer to default framebuffer's depth buffer
glBindFramebuffer(GL_READ_FRAMEBUFFER, gBuffer);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); // Write to default framebuffer
// blit to default framebuffer. Note that this may or may not work as the internal formats of both the FBO and default framebuffer have to match.
// the internal formats are implementation defined. This works on all of my systems, but if it doesn't on yours you'll likely have to write to the
// depth buffer in another stage (or somehow see to match the default framebuffer's internal format with the FBO's internal format).
glBlitFramebuffer(0, 0, SCR_WIDTH, SCR_HEIGHT, 0, 0, SCR_WIDTH, SCR_HEIGHT, GL_DEPTH_BUFFER_BIT, GL_NEAREST);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// 3. Render lights on top of scene, by blitting
shaderLightBox.Use();
glUniformMatrix4fv(glGetUniformLocation(shaderLightBox.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
glUniformMatrix4fv(glGetUniformLocation(shaderLightBox.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
for (GLuint i = 0; i < lightPositions.size(); i++)
{
model = glm::mat4();
model = glm::translate(model, lightPositions[i]);
model = glm::scale(model, glm::vec3(0.25f));
glUniformMatrix4fv(glGetUniformLocation(shaderLightBox.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
glUniform3fv(glGetUniformLocation(shaderLightBox.Program, "lightColor"), 1, &lightColors[i][0]);
RenderCube();
}
// Swap the buffers
glfwSwapBuffers(window);
}
glfwTerminate();
return 0;
}
void Render(void) {
RenderToTextures();
RenderQuad();
}
// The MAIN function, from here we start our application and run our Game loop
int main()
{
// Init GLFW
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", nullptr, nullptr); // Windowed
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, mouse_callback);
glfwSetScrollCallback(window, scroll_callback);
// Options
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// Initialize GLEW to setup the OpenGL Function pointers
glewExperimental = GL_TRUE;
glewInit();
// Define the viewport dimensions
glViewport(0, 0, SCR_WIDTH, SCR_HEIGHT);
// Setup some OpenGL options
glEnable(GL_DEPTH_TEST);
// Setup and compile our shaders
Shader shader("resources/normal_map/normal_mapping.vs", "resources/normal_map/normal_mapping.frag");
// Load textures
GLuint diffuseMap = loadTexture("resources/normal_map/brickwall.jpg");
GLuint normalMap = loadTexture("resources/normal_map/brickwall_normal.jpg");
// Set texture units
shader.Use();
glUniform1i(glGetUniformLocation(shader.Program, "diffuseMap"), 0);
glUniform1i(glGetUniformLocation(shader.Program, "normalMap"), 1);
// Light position
glm::vec3 lightPos(0.5f, 1.0f, 0.3f);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Set frame time
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
// Check and call events
glfwPollEvents();
Do_Movement();
// Clear the colorbuffer
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Configure view/projection matrices
shader.Use();
glm::mat4 view = camera.GetViewMatrix();
glm::mat4 projection = glm::perspective(camera.Zoom, (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
// Render normal-mapped quad
glm::mat4 model;
model = glm::rotate(model, (GLfloat)glfwGetTime() * -0.1f, glm::normalize(glm::vec3(1.0, 0.0, 1.0))); // Rotates the quad to show normal mapping works in all directions
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
glUniform3fv(glGetUniformLocation(shader.Program, "lightPos"), 1, &lightPos[0]);
glUniform3fv(glGetUniformLocation(shader.Program, "viewPos"), 1, &camera.Position[0]);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, diffuseMap);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, normalMap);
RenderQuad();
// render light source (simply re-renders a smaller plane at the light's position for debugging/visualization)
model = glm::mat4();
model = glm::translate(model, lightPos);
model = glm::scale(model, glm::vec3(0.1f));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
RenderQuad();
// Swap the buffers
glfwSwapBuffers(window);
}
glfwTerminate();
return 0;
}
void SCRenderer::RenderBlock(RSArea* area, int LOD, int i, bool renderTexture){
AreaBlock* block = area->GetAreaBlockByID(LOD, i);
uint32_t sideSize = block->sideSize;
for (size_t x=0 ; x < sideSize-1 ; x ++){
for (size_t y=0 ; y < sideSize-1 ; y ++){
MapVertex* currentVertex = &block->vertice[x+y*sideSize];
MapVertex* rightVertex = &block->vertice[(x+1)+y*sideSize];
MapVertex* bottomRightVertex = &block->vertice[(x+1)+(y+1)*sideSize];
MapVertex* bottomVertex = &block->vertice[x+(y+1)*sideSize];
RenderQuad(currentVertex,rightVertex, bottomRightVertex, bottomVertex,area,renderTexture);
}
}
//Inter-block right side
if ( i % 18 != 17){
AreaBlock* currentBlock = area->GetAreaBlockByID(LOD, i);
AreaBlock* rightBlock = area->GetAreaBlockByID(LOD, i+1);
for (int y=0 ; y < sideSize-1 ; y ++){
MapVertex* currentVertex = currentBlock->GetVertice(currentBlock->sideSize-1, y);
MapVertex* rightVertex = rightBlock->GetVertice(0, y);
MapVertex* bottomRightVertex = rightBlock->GetVertice(0, y+1);
MapVertex* bottomVertex = currentBlock->GetVertice(currentBlock->sideSize-1, y+1);
RenderQuad(currentVertex,rightVertex, bottomRightVertex, bottomVertex,area,renderTexture);
}
}
//Inter-block bottom side
if ( i / 18 != 17){
AreaBlock* currentBlock = area->GetAreaBlockByID(LOD, i);
AreaBlock* bottomBlock = area->GetAreaBlockByID(LOD, i+BLOCK_PER_MAP_SIDE);
for (int x=0 ; x < sideSize-1 ; x++){
MapVertex* currentVertex = currentBlock->GetVertice(x,currentBlock->sideSize-1);
MapVertex* rightVertex = currentBlock->GetVertice(x+1,currentBlock->sideSize-1);
MapVertex* bottomRightVertex = bottomBlock->GetVertice(x+1,0);
MapVertex* bottomVertex = bottomBlock->GetVertice(x,0);
RenderQuad(currentVertex,rightVertex, bottomRightVertex, bottomVertex,area,renderTexture);
}
}
//Inter bottom-right quad
if ( i % 18 != 17 && i / 18 != 17){
AreaBlock* currentBlock = area->GetAreaBlockByID(LOD, i);
AreaBlock* rightBlock = area->GetAreaBlockByID(LOD, i+1);
AreaBlock* rightBottonBlock = area->GetAreaBlockByID(LOD, i+1+BLOCK_PER_MAP_SIDE);
AreaBlock* bottomBlock = area->GetAreaBlockByID(LOD, i+BLOCK_PER_MAP_SIDE);
MapVertex* currentVertex = currentBlock->GetVertice(currentBlock->sideSize-1,currentBlock->sideSize-1);
MapVertex* rightVertex = rightBlock->GetVertice(0,currentBlock->sideSize-1);
MapVertex* bottomRightVertex = rightBottonBlock->GetVertice(0,0);
MapVertex* bottomVertex = bottomBlock->GetVertice(currentBlock->sideSize-1,0);
RenderQuad(currentVertex,rightVertex, bottomRightVertex, bottomVertex,area,renderTexture);
}
}
// The MAIN function, from here we start our application and run our Game loop
int main()
{
// Init GLFW
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", nullptr, nullptr); // Windowed
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, mouse_callback);
glfwSetScrollCallback(window, scroll_callback);
// Options
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// Initialize GLEW to setup the OpenGL Function pointers
glewExperimental = GL_TRUE;
glewInit();
// Define the viewport dimensions
glViewport(0, 0, SCR_WIDTH, SCR_HEIGHT);
// Setup some OpenGL options
glEnable(GL_DEPTH_TEST);
// Setup and compile our shaders
////Shader shader("shadow_mapping.vs", "shadow_mapping.frag");
Shader simpleDepthShader("shadow_mapping_depth.vs", "shadow_mapping_depth.frag");
Shader shaderGeometryPass("g_buffer.vs", "g_buffer.frag");
Shader shaderLightingPass("deferred_shading.vs", "deferred_shading.frag");
// Set texture samples
////shader.Use();
////glUniform1i(glGetUniformLocation(shader.Program, "diffuseTexture"), 0);
////glUniform1i(glGetUniformLocation(shader.Program, "shadowMap"), 1);
// Set samplers
shaderLightingPass.Use();
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gPosition"), 0);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gNormal"), 1);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gAlbedoSpec"), 2);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gDepthViewer"), 3);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gShadowMap"), 4);
shaderGeometryPass.Use();
glUniform1i(glGetUniformLocation(shaderGeometryPass.Program, "texture_diffuse1"), 0);
glUniform1i(glGetUniformLocation(shaderGeometryPass.Program, "texture_specular1"), 1);
GLfloat planeVertices[] = {
// Positions // Normals // Texture Coords
25.0f, -0.5f, 25.0f, 0.0f, 1.0f, 0.0f, 25.0f, 0.0f,
-25.0f, -0.5f, -25.0f, 0.0f, 1.0f, 0.0f, 0.0f, 25.0f,
-25.0f, -0.5f, 25.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
25.0f, -0.5f, 25.0f, 0.0f, 1.0f, 0.0f, 25.0f, 0.0f,
25.0f, -0.5f, -25.0f, 0.0f, 1.0f, 0.0f, 25.0f, 25.0f,
-25.0f, -0.5f, -25.0f, 0.0f, 1.0f, 0.0f, 0.0f, 25.0f
};
// Setup plane VAO
GLuint planeVBO;
glGenVertexArrays(1, &planeVAO);
glGenBuffers(1, &planeVBO);
glBindVertexArray(planeVAO);
glBindBuffer(GL_ARRAY_BUFFER, planeVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(planeVertices), &planeVertices, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(6 * sizeof(GLfloat)));
glBindVertexArray(0);
// Light source
glm::vec3 lightPos(-2.0f, 4.0f, -1.0f);
// Load textures
woodTexture = loadTexture(FileSystem::getPath("resources/textures/wood.png").c_str());
// Configure depth map FBO
const GLuint SHADOW_WIDTH = 1024, SHADOW_HEIGHT = 1024;
GLuint depthMapFBO;
glGenFramebuffers(1, &depthMapFBO);
// - Create depth texture
GLuint gShadowMap;
glGenTextures(1, &gShadowMap);
glBindTexture(GL_TEXTURE_2D, gShadowMap);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, SHADOW_WIDTH, SHADOW_HEIGHT, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glBindFramebuffer(GL_FRAMEBUFFER, depthMapFBO);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, gShadowMap, 0);
glDrawBuffer(GL_NONE);
glReadBuffer(GL_NONE);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// Set up G-Buffer
// 3 textures:
// 1. Positions (RGB)
// 2. Color (RGB) + Specular (A)
// 3. Normals (RGB)
//// 4. gDepthViewer (DEPTH)
GLuint gBuffer;
glGenFramebuffers(1, &gBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, gBuffer);
GLuint gPosition, gNormal, gAlbedoSpec, gDepthViewer;
// - Position color buffer
glGenTextures(1, &gPosition);
glBindTexture(GL_TEXTURE_2D, gPosition);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gPosition, 0);
// - Normal color buffer
glGenTextures(1, &gNormal);
glBindTexture(GL_TEXTURE_2D, gNormal);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, gNormal, 0);
// - Color + Specular color buffer
glGenTextures(1, &gAlbedoSpec);
glBindTexture(GL_TEXTURE_2D, gAlbedoSpec);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGBA, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, gAlbedoSpec, 0);
// - Depth Map from viewer buffer
glGenTextures(1, &gDepthViewer);
glBindTexture(GL_TEXTURE_2D, gDepthViewer);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGBA, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3, GL_TEXTURE_2D, gDepthViewer, 0);
// - Tell OpenGL which color attachments we'll use (of this framebuffer) for rendering
GLuint attachments[4] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2, GL_COLOR_ATTACHMENT3 }; //////check!
glDrawBuffers(4, attachments);
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Set frame time
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
// Check and call events
glfwPollEvents();
Do_Movement();
// Change light position over time
lightPos.z = cos(glfwGetTime()) * 2.0f;
// 1. Render depth of scene to texture (from light's perspective)
// - Get light projection/view matrix.
glm::mat4 lightProjection, lightView;
glm::mat4 lightSpaceMatrix;
GLfloat near_plane = 1.0f, far_plane = 9.5f;
//lightProjection = glm::ortho(-10.0f, 10.0f, -10.0f, 10.0f, near_plane, far_plane);
lightProjection = glm::perspective(65.0f, (GLfloat)SHADOW_WIDTH / (GLfloat)SHADOW_HEIGHT, near_plane, far_plane); // Note that if you use a perspective projection matrix you'll have to change the light position as the current light position isn't enough to reflect the whole scene.
lightView = glm::lookAt(lightPos, glm::vec3(0.0f), glm::vec3(1.0));
lightSpaceMatrix = lightProjection * lightView;
// - now render scene from light's point of view
simpleDepthShader.Use();
glUniformMatrix4fv(glGetUniformLocation(simpleDepthShader.Program, "lightSpaceMatrix"), 1, GL_FALSE, glm::value_ptr(lightSpaceMatrix));
glViewport(0, 0, SHADOW_WIDTH, SHADOW_HEIGHT);
glBindFramebuffer(GL_FRAMEBUFFER, depthMapFBO);
glClear(GL_DEPTH_BUFFER_BIT);
RenderScene(simpleDepthShader);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
/*
// 2. Render scene as normal
glViewport(0, 0, SCR_WIDTH, SCR_HEIGHT);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
shader.Use();
glm::mat4 projection = glm::perspective(camera.Zoom, (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
glm::mat4 view = camera.GetViewMatrix();
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
// Set light uniforms
glUniform3fv(glGetUniformLocation(shader.Program, "lightPos"), 1, &lightPos[0]);
glUniform3fv(glGetUniformLocation(shader.Program, "viewPos"), 1, &camera.Position[0]);
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "lightSpaceMatrix"), 1, GL_FALSE, glm::value_ptr(lightSpaceMatrix));
// Enable/Disable shadows by pressing 'SPACE'
glUniform1i(glGetUniformLocation(shader.Program, "shadows"), shadows);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, woodTexture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, depthMap);
RenderScene(shader);
*/
glBindFramebuffer(GL_FRAMEBUFFER, gBuffer);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
shaderGeometryPass.Use();
glm::mat4 projection = glm::perspective(camera.Zoom, (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
glm::mat4 view = camera.GetViewMatrix();
glUniformMatrix4fv(glGetUniformLocation(shaderGeometryPass.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
glUniformMatrix4fv(glGetUniformLocation(shaderGeometryPass.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(glGetUniformLocation(shaderGeometryPass.Program, "lightSpaceMatrix"), 1, GL_FALSE, glm::value_ptr(lightSpaceMatrix));
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, woodTexture);
RenderScene(shaderGeometryPass);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
shaderLightingPass.Use();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, gPosition);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, gNormal);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, gAlbedoSpec);
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_2D, gDepthViewer);
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_2D, gShadowMap);
// Also send light relevant uniforms
glUniform3fv(glGetUniformLocation(shaderLightingPass.Program, "lightPos"), 1, &lightPos[0]);
glUniform3fv(glGetUniformLocation(shaderLightingPass.Program, "viewPos"), 1, &camera.Position[0]);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "draw_mode"), draw_mode);
RenderQuad();
// Swap the buffers
glfwSwapBuffers(window);
}
glfwTerminate();
return 0;
}
// The MAIN function, from here we start our application and run our Game loop
int main()
{
// Init GLFW
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", nullptr, nullptr); // Windowed
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, mouse_callback);
glfwSetScrollCallback(window, scroll_callback);
// Options
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// Initialize GLEW to setup the OpenGL Function pointers
glewExperimental = GL_TRUE;
glewInit();
glGetError();
// Define the viewport dimensions
glViewport(0, 0, SCR_WIDTH, SCR_HEIGHT);
// Setup some OpenGL options
glEnable(GL_DEPTH_TEST);
// Setup and compile our shaders
Shader shaderGeometryPass("ssao_geometry.vs", "ssao_geometry.frag");
Shader shaderLightingPass("ssao.vs", "ssao_lighting.frag");
Shader shaderSSAO("ssao.vs", "ssao.frag");
Shader shaderSSAOBlur("ssao.vs", "ssao_blur.frag");
// Set samplers
shaderLightingPass.Use();
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gPositionDepth"), 0);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gNormal"), 1);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "gAlbedo"), 2);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "ssao"), 3);
shaderSSAO.Use();
glUniform1i(glGetUniformLocation(shaderSSAO.Program, "gPositionDepth"), 0);
glUniform1i(glGetUniformLocation(shaderSSAO.Program, "gNormal"), 1);
glUniform1i(glGetUniformLocation(shaderSSAO.Program, "texNoise"), 2);
// Objects
Model nanosuit(FileSystem::getPath("resources/objects/nanosuit/nanosuit.obj").c_str());
// Lights
glm::vec3 lightPos = glm::vec3(2.0, 4.0, -2.0);
glm::vec3 lightColor = glm::vec3(0.2, 0.2, 0.7);
// Set up G-Buffer
// 3 textures:
// 1. Positions + depth (RGBA)
// 2. Color (RGB)
// 3. Normals (RGB)
GLuint gBuffer;
glGenFramebuffers(1, &gBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, gBuffer);
GLuint gPositionDepth, gNormal, gAlbedo;
// - Position + linear depth color buffer
glGenTextures(1, &gPositionDepth);
glBindTexture(GL_TEXTURE_2D, gPositionDepth);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gPositionDepth, 0);
// - Normal color buffer
glGenTextures(1, &gNormal);
glBindTexture(GL_TEXTURE_2D, gNormal);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, gNormal, 0);
// - Albedo color buffer
glGenTextures(1, &gAlbedo);
glBindTexture(GL_TEXTURE_2D, gAlbedo);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGBA, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, gAlbedo, 0);
// - Tell OpenGL which color attachments we'll use (of this framebuffer) for rendering
GLuint attachments[3] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2 };
glDrawBuffers(3, attachments);
// - Create and attach depth buffer (renderbuffer)
GLuint rboDepth;
glGenRenderbuffers(1, &rboDepth);
glBindRenderbuffer(GL_RENDERBUFFER, rboDepth);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, SCR_WIDTH, SCR_HEIGHT);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboDepth);
// - Finally check if framebuffer is complete
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
std::cout << "GBuffer Framebuffer not complete!" << std::endl;
// Also create framebuffer to hold SSAO processing stage
GLuint ssaoFBO, ssaoBlurFBO;
glGenFramebuffers(1, &ssaoFBO); glGenFramebuffers(1, &ssaoBlurFBO);
glBindFramebuffer(GL_FRAMEBUFFER, ssaoFBO);
GLuint ssaoColorBuffer, ssaoColorBufferBlur;
// - SSAO color buffer
glGenTextures(1, &ssaoColorBuffer);
glBindTexture(GL_TEXTURE_2D, ssaoColorBuffer);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, ssaoColorBuffer, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
std::cout << "SSAO Framebuffer not complete!" << std::endl;
// - and blur stage
glBindFramebuffer(GL_FRAMEBUFFER, ssaoBlurFBO);
glGenTextures(1, &ssaoColorBufferBlur);
glBindTexture(GL_TEXTURE_2D, ssaoColorBufferBlur);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, SCR_WIDTH, SCR_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, ssaoColorBufferBlur, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
std::cout << "SSAO Blur Framebuffer not complete!" << std::endl;
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// Sample kernel
std::uniform_real_distribution<GLfloat> randomFloats(0.0, 1.0); // generates random floats between 0.0 and 1.0
std::default_random_engine generator;
std::vector<glm::vec3> ssaoKernel;
for (GLuint i = 0; i < 64; ++i)
{
glm::vec3 sample(randomFloats(generator) * 2.0 - 1.0, randomFloats(generator) * 2.0 - 1.0, randomFloats(generator));
sample = glm::normalize(sample);
sample *= randomFloats(generator);
GLfloat scale = GLfloat(i) / 64.0;
// Scale samples s.t. they're more aligned to center of kernel
scale = lerp(0.1f, 1.0f, scale * scale);
sample *= scale;
ssaoKernel.push_back(sample);
}
// Noise texture
std::vector<glm::vec3> ssaoNoise;
for (GLuint i = 0; i < 16; i++)
{
glm::vec3 noise(randomFloats(generator) * 2.0 - 1.0, randomFloats(generator) * 2.0 - 1.0, 0.0f); // rotate around z-axis (in tangent space)
ssaoNoise.push_back(noise);
}
GLuint noiseTexture; glGenTextures(1, &noiseTexture);
glBindTexture(GL_TEXTURE_2D, noiseTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, 4, 4, 0, GL_RGB, GL_FLOAT, &ssaoNoise[0]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Set frame time
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
// Check and call events
glfwPollEvents();
Do_Movement();
// 1. Geometry Pass: render scene's geometry/color data into gbuffer
glBindFramebuffer(GL_FRAMEBUFFER, gBuffer);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glm::mat4 projection = glm::perspective(camera.Zoom, (GLfloat)SCR_WIDTH / (GLfloat)SCR_HEIGHT, 0.1f, 50.0f);
glm::mat4 view = camera.GetViewMatrix();
glm::mat4 model;
shaderGeometryPass.Use();
glUniformMatrix4fv(glGetUniformLocation(shaderGeometryPass.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
glUniformMatrix4fv(glGetUniformLocation(shaderGeometryPass.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
// Floor cube
model = glm::translate(model, glm::vec3(0.0, -1.0f, 0.0f));
model = glm::scale(model, glm::vec3(20.0f, 1.0f, 20.0f));
glUniformMatrix4fv(glGetUniformLocation(shaderGeometryPass.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
RenderCube();
// Nanosuit model on the floor
model = glm::mat4();
model = glm::translate(model, glm::vec3(0.0f, 0.0f, 5.0));
model = glm::rotate(model, -90.0f, glm::vec3(1.0, 0.0, 0.0));
model = glm::scale(model, glm::vec3(0.5f));
glUniformMatrix4fv(glGetUniformLocation(shaderGeometryPass.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
nanosuit.Draw(shaderGeometryPass);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// 2. Create SSAO texture
glBindFramebuffer(GL_FRAMEBUFFER, ssaoFBO);
glClear(GL_COLOR_BUFFER_BIT);
shaderSSAO.Use();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, gPositionDepth);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, gNormal);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, noiseTexture);
// Send kernel + rotation
for (GLuint i = 0; i < 64; ++i)
glUniform3fv(glGetUniformLocation(shaderSSAO.Program, ("samples[" + std::to_string(i) + "]").c_str()), 1, &ssaoKernel[i][0]);
glUniformMatrix4fv(glGetUniformLocation(shaderSSAO.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
RenderQuad();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// 3. Blur SSAO texture to remove noise
glBindFramebuffer(GL_FRAMEBUFFER, ssaoBlurFBO);
glClear(GL_COLOR_BUFFER_BIT);
shaderSSAOBlur.Use();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, ssaoColorBuffer);
RenderQuad();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// 4. Lighting Pass: traditional deferred Blinn-Phong lighting now with added screen-space ambient occlusion
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
shaderLightingPass.Use();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, gPositionDepth);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, gNormal);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, gAlbedo);
glActiveTexture(GL_TEXTURE3); // Add extra SSAO texture to lighting pass
glBindTexture(GL_TEXTURE_2D, ssaoColorBufferBlur);
// Also send light relevant uniforms
glm::vec3 lightPosView = glm::vec3(camera.GetViewMatrix() * glm::vec4(lightPos, 1.0));
glUniform3fv(glGetUniformLocation(shaderLightingPass.Program, "light.Position"), 1, &lightPosView[0]);
glUniform3fv(glGetUniformLocation(shaderLightingPass.Program, "light.Color"), 1, &lightColor[0]);
// Update attenuation parameters
const GLfloat constant = 1.0; // Note that we don't send this to the shader, we assume it is always 1.0 (in our case)
const GLfloat linear = 0.09;
const GLfloat quadratic = 0.032;
glUniform1f(glGetUniformLocation(shaderLightingPass.Program, "light.Linear"), linear);
glUniform1f(glGetUniformLocation(shaderLightingPass.Program, "light.Quadratic"), quadratic);
glUniform1i(glGetUniformLocation(shaderLightingPass.Program, "draw_mode"), draw_mode);
RenderQuad();
// Swap the buffers
glfwSwapBuffers(window);
}
glfwTerminate();
return 0;
}
