void Window1_Render(Win32Window* window, float alpha, float elapsedtime)
{
static float time = 0;
float world[16];
time += elapsedtime;
DrawingItem* drawingitem = window->GetDrawingItem();
DrawingLayer& bottomlayer = drawingitem->GetBottomLayer();
{
NativeContext context = bottomlayer.GetContext();
float bigradius = 150;
float smallradius = 80;
float m2pi = 6.293185f;
int segments = 16;
GLMatrixRotationAxis(world, fmodf(time * 20.0f, 360.0f) * (3.14152f / 180.0f), 0, 0, 1);
context.Clear(OpenGLColor(0.0f, 0.125f, 0.3f, 1.0f));
context.SetWorldTransform(world);
context.MoveTo(0, bigradius);
for( int i = 1; i <= segments; ++i )
{
if( i % 2 == 1 )
{
context.LineTo(
sinf((m2pi / segments) * i) * smallradius,
cosf((m2pi / segments) * i) * smallradius);
}
else
{
context.LineTo(
sinf((m2pi / segments) * i) * bigradius,
cosf((m2pi / segments) * i) * bigradius);
}
}
}
DrawingLayer& feedbacklayer = drawingitem->GetFeedbackLayer();
{
NativeContext context = feedbacklayer.GetContext();
GLMatrixRotationAxis(world, -fmodf(time * 20.0f, 360.0f) * (3.14152f / 180.0f), 0, 0, 1);
context.Clear(OpenGLColor(0, 0, 0, 0));
context.SetWorldTransform(world);
context.SetColor(OpenGLColor(0, 1, 0, 1));
context.MoveTo(-120, 120);
context.LineTo(120, 120);
context.LineTo(120, -120);
context.LineTo(-120, -120);
context.LineTo(-120, 120);
}
drawingitem->RecomposeLayers();
}
void Render(float alpha, float elapsedtime)
{
static float time = 0;
float lightpos[4] = { 6, 3, 10, 1 };
float eye[3] = { 0, 0, 3 };
float look[3] = { 0, 0, 0 };
float up[3] = { 0, 1, 0 };
float view[16];
float proj[16];
float world[16];
float viewproj[16];
float tmp1[16];
float tmp2[16];
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
GLMatrixLookAtRH(view, eye, look, up);
GLMatrixPerspectiveFovRH(proj, (60.0f * 3.14159f) / 180.f, (float)screenwidth / (float)screenheight, 0.1f, 100.0f);
GLMatrixMultiply(viewproj, view, proj);
//calculate world matrix
GLMatrixIdentity(tmp2);
tmp2[12] = -0.108f; // offset with bb center
tmp2[13] = -0.7875f; // offset with bb center
GLMatrixRotationAxis(tmp1, fmodf(time * 20.0f, 360.0f) * (3.14152f / 180.0f), 1, 0, 0);
GLMatrixMultiply(world, tmp2, tmp1);
GLMatrixRotationAxis(tmp2, fmodf(time * 20.0f, 360.0f) * (3.14152f / 180.0f), 0, 1, 0);
GLMatrixMultiply(world, world, tmp2);
// render
time += elapsedtime;
glUseProgram(program);
glUniform4fv(uniform_eyePos, 1, eye);
glUniform4fv(uniform_lightPos, 1, lightpos);
glUniformMatrix4fv(uniform_matWorld, 1, false, world);
glUniformMatrix4fv(uniform_matViewProj, 1, false, viewproj);
{
mesh->DrawSubset(0);
}
glUseProgram(0);
// check errors
GLenum err = glGetError();
if( err != GL_NO_ERROR )
std::cout << "Error\n";
SwapBuffers(hdc);
}
void FPSCamera::GetViewVectors(float forward[3], float right[3], float up[3])
{
float yaw[16];
float pitch[16];
// TODO: rollpitchyaw
GLMatrixRotationAxis(yaw, anglecurve.curr[0], 0, 1, 0);
GLMatrixRotationAxis(pitch, anglecurve.curr[1], 1, 0, 0);
GLMatrixMultiply(view, yaw, pitch);
GLVec3Set(forward, -view[2], -view[6], -view[10]);
GLVec3Set(right, view[0], view[4], view[8]);
GLVec3Set(up, view[1], view[5], view[9]);
}
void Window2_Render(Win32Window* window, float alpha, float elapsedtime)
{
static float time = 0;
float world[16];
time += elapsedtime;
DrawingItem* drawingitem = window->GetDrawingItem();
DrawingLayer& bottomlayer = drawingitem->GetBottomLayer();
{
NativeContext context = bottomlayer.GetContext();
GLMatrixRotationAxis(world, -fmodf(time * 20.0f, 360.0f) * (3.14152f / 180.0f), 0, 0, 1);
context.Clear(OpenGLColor(0.0f, 0.125f, 0.3f, 1.0f));
context.SetWorldTransform(world);
context.SetColor(OpenGLColor(1, 1, 1, 1));
context.MoveTo(-120, 120);
context.LineTo(120, 120);
context.LineTo(120, -120);
context.LineTo(-120, -120);
context.LineTo(-120, 120);
}
drawingitem->RecomposeLayers();
}
void FPSCamera::Animate(float alpha)
{
anglecurve.smooth(smoothedangles, alpha);
body->GetInterpolatedPosition(position, alpha);
position[1] += (1.8f - CAMERA_RADIUS);
// recalculate view matrix
float yaw[16];
float pitch[16];
// TODO: rollpitchyaw
GLMatrixRotationAxis(yaw, smoothedangles[0], 0, 1, 0);
GLMatrixRotationAxis(pitch, smoothedangles[1], 1, 0, 0);
GLMatrixMultiply(view, yaw, pitch);
view[12] = -(position[0] * view[0] + position[1] * view[4] + position[2] * view[8]);
view[13] = -(position[0] * view[1] + position[1] * view[5] + position[2] * view[9]);
view[14] = -(position[0] * view[2] + position[1] * view[6] + position[2] * view[10]);
}
void RenderScene(OpenGLEffect* effect)
{
float world[16];
float worldinv[16];
float tmp[16];
GLMatrixIdentity(world);
for( int i = 0; i < numobjects; ++i )
{
const SceneObject& obj = objects[i];
GLMatrixScaling(tmp, obj.scale[0], obj.scale[1], obj.scale[2]);
GLMatrixRotationAxis(world, obj.angle, 0, 1, 0);
GLMatrixMultiply(world, tmp, world);
GLMatrixTranslation(tmp, obj.position[0], obj.position[1], obj.position[2]);
GLMatrixMultiply(world, world, tmp);
GLMatrixInverse(worldinv, world);
effect->SetMatrix("matWorld", world);
effect->SetMatrix("matWorldInv", worldinv);
if( obj.type == 0 )
{
float uv[] = { 2, 2, 0, 1 };
effect->SetVector("uv", uv);
effect->CommitChanges();
glBindTexture(GL_TEXTURE_2D, texture1);
box->DrawSubset(0);
}
else if( obj.type == 1 )
{
float uv[] = { 1, 1, 0, 1 };
effect->SetVector("uv", uv);
effect->CommitChanges();
glBindTexture(GL_TEXTURE_2D, texture2);
teapot->DrawSubset(0);
}
}
glBindTexture(GL_TEXTURE_2D, 0);
}
void THREAD_Run()
{
float world[16];
float time = 0;
while( true )
{
if( !glwindow )
continue;
DrawingItem* drawingitem = glwindow->GetDrawingItem();
DrawingLayer& feedbacklayer = drawingitem->GetFeedbackLayer();
{
NativeContext context = feedbacklayer.GetContext();
float bigradius = 150;
float smallradius = 80;
float m2pi = 6.293185f;
int segments = 16;
GLMatrixRotationAxis(world, fmodf(time * 20.0f, 360.0f) * (3.14152f / 180.0f), 0, 0, 1);
context.Clear(OpenGLColor(0, 0, 0, 0));
context.SetWorldTransform(world);
context.SetColor(OpenGLColor(0, 1, 0, 1));
context.MoveTo(0, bigradius);
for( int i = 1; i <= segments; ++i )
{
if( i % 2 == 1 )
{
context.LineTo(
sinf((m2pi / segments) * i) * smallradius,
cosf((m2pi / segments) * i) * smallradius);
}
else
{
context.LineTo(
sinf((m2pi / segments) * i) * bigradius,
cosf((m2pi / segments) * i) * bigradius);
}
}
}
time += 0.5f;
Sleep(500); // 34
}
}
bool InitScene()
{
SetWindowText(hwnd, TITLE);
Quadron::qGLExtensions::QueryFeatures(hdc);
if( !Quadron::qGLExtensions::ARB_shader_storage_buffer_object )
return false;
#ifdef _DEBUG
if( Quadron::qGLExtensions::ARB_debug_output )
{
glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, 0, GL_TRUE);
glDebugMessageCallback(ReportGLError, 0);
}
#endif
glClearColor(0.0f, 0.125f, 0.3f, 1.0f);
//glClearColor(1, 1, 1, 1);
glClearDepth(1.0);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glDepthFunc(GL_LEQUAL);
glEnable(GL_DEPTH_TEST);
screenquad = new OpenGLScreenQuad();
// load objects
if( !GLCreateMeshFromQM("../media/meshes/cube.qm", &box) )
{
MYERROR("Could not load box");
return false;
}
if( !GLCreateMeshFromQM("../media/meshes/dragon.qm", &dragon) )
{
MYERROR("Could not load dragon");
return false;
}
if( !GLCreateMeshFromQM("../media/meshes/happy1.qm", &buddha) )
{
MYERROR("Could not load buddha");
return false;
}
// create texture
glGenTextures(1, &white);
glBindTexture(GL_TEXTURE_2D, white);
{
unsigned int wondercolor = 0xffffffff;
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, &wondercolor);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
// create buffers
size_t headsize = 16; // start, count, pad, pad
size_t nodesize = 16; // color, depth, next, pad
size_t numlists = screenwidth * screenheight;
glGenBuffers(1, &headbuffer);
glGenBuffers(1, &nodebuffer);
glGenBuffers(1, &counterbuffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, headbuffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, numlists * headsize, 0, GL_STATIC_DRAW);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, nodebuffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, numlists * 4 * nodesize, 0, GL_STATIC_DRAW); // 120 MB @ 1080p
glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, counterbuffer);
glBufferData(GL_ATOMIC_COUNTER_BUFFER, sizeof(GLuint), 0, GL_DYNAMIC_DRAW);
glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, 0);
// calculate scene bounding box
OpenGLAABox tmpbox;
float world[16];
float tmp[16];
GLMatrixIdentity(world);
for( int i = 0; i < numobjects; ++i )
{
const SceneObject& obj = objects[i];
// scaling * rotation * translation
GLMatrixScaling(tmp, obj.scale[0], obj.scale[1], obj.scale[2]);
GLMatrixRotationAxis(world, obj.angle, 0, 1, 0);
GLMatrixMultiply(world, tmp, world);
GLMatrixTranslation(tmp, obj.position[0], obj.position[1], obj.position[2]);
GLMatrixMultiply(world, world, tmp);
if( obj.type == 0 )
tmpbox = box->GetBoundingBox();
else if( obj.type == 1 )
tmpbox = dragon->GetBoundingBox();
else if( obj.type == 2 )
tmpbox = buddha->GetBoundingBox();
tmpbox.TransformAxisAligned(world);
scenebox.Add(tmpbox.Min);
scenebox.Add(tmpbox.Max);
}
// head pointer initializer
if( !GLCreateEffectFromFile("../media/shadersGL/basic2D.vert", 0, "../media/shadersGL/initheadpointers.frag", &init) )
{
MYERROR("Could not load initializer shader");
return false;
}
// renderer shader
if( !GLCreateEffectFromFile("../media/shadersGL/basic2D.vert", 0, "../media/shadersGL/renderfragments.frag", &render) )
{
MYERROR("Could not load rendering shader");
return false;
}
// fragment collector shader
if( !GLCreateEffectFromFile("../media/shadersGL/collectfragments.vert", 0, "../media/shadersGL/collectfragments.frag", &collect) )
{
MYERROR("Could not load collector shader");
return false;
}
float angles[2] = { 0.25f, -0.7f };
cameraangle = angles;
return true;
}
void Render(float alpha, float elapsedtime)
{
float world[16];
float tmp[16];
float view[16];
float proj[16];
float viewproj[16];
float eye[3] = { 0, 0.3f, 8 };
float look[3] = { 0, 0.3f, 0 };
float up[3] = { 0, 1, 0 };
float clipplanes[2];
float orient[2];
cameraangle.smooth(orient, alpha);
GLMatrixRotationAxis(view, orient[1], 1, 0, 0);
GLMatrixRotationAxis(tmp, orient[0], 0, 1, 0);
GLMatrixMultiply(view, view, tmp);
GLVec3Transform(eye, eye, view);
GLFitToBox(clipplanes[0], clipplanes[1], eye, look, scenebox);
GLMatrixPerspectiveFovRH(proj, (60.0f * 3.14159f) / 180.f, (float)screenwidth / (float)screenheight, clipplanes[0], clipplanes[1]);
GLMatrixLookAtRH(view, eye, look, up);
GLMatrixMultiply(viewproj, view, proj);
// STEP 1: initialize header pointer buffer
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glDisable(GL_DEPTH_TEST);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, headbuffer);
init->SetInt("screenWidth", screenwidth);
init->Begin();
{
screenquad->Draw();
}
init->End();
// STEP 2: collect transparent fragments into lists
glBindTexture(GL_TEXTURE_2D, white);
glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, counterbuffer);
GLuint* counter = (GLuint*)glMapBuffer(GL_ATOMIC_COUNTER_BUFFER, GL_WRITE_ONLY);
*counter = 0;
glUnmapBuffer(GL_ATOMIC_COUNTER_BUFFER);
glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, 0);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, nodebuffer);
glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, counterbuffer);
collect->SetMatrix("matView", view);
collect->SetMatrix("matProj", proj);
collect->SetInt("screenWidth", screenwidth);
collect->Begin();
{
GLMatrixIdentity(world);
for( int i = 0; i < numobjects; ++i )
{
const SceneObject& obj = objects[i];
// scaling * rotation * translation
GLMatrixScaling(tmp, obj.scale[0], obj.scale[1], obj.scale[2]);
GLMatrixRotationAxis(world, obj.angle, 0, 1, 0);
GLMatrixMultiply(world, tmp, world);
GLMatrixTranslation(tmp, obj.position[0], obj.position[1], obj.position[2]);
GLMatrixMultiply(world, world, tmp);
collect->SetMatrix("matWorld", world);
collect->SetVector("matAmbient", &obj.color.r);
collect->CommitChanges();
if( obj.type == 0 )
box->DrawSubset(0);
else if( obj.type == 1 )
dragon->DrawSubset(0);
else if( obj.type == 2 )
buddha->DrawSubset(0);
}
}
collect->End();
glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, 0);
// STEP 3: render
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_SRC_ALPHA);
render->SetInt("screenWidth", screenwidth);
render->Begin();
{
screenquad->Draw();
}
render->End();
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, 0);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, 0);
glDisable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
#ifdef _DEBUG
// check errors
GLenum err = glGetError();
if( err != GL_NO_ERROR )
std::cout << "Error\n";
#endif
SwapBuffers(hdc);
mousedx = mousedy = 0;
}
void Render(float alpha, float elapsedtime)
{
float tmp[16];
float texmat[16];
float view[16];
float viewinv[16];
float proj[16];
float viewproj[16];
float lightview[16];
float lightproj[16];
float lightviewproj[16];
float globalambient[4] = { 0.01f, 0.01f, 0.01f, 1.0f };
float moonlight[] = { -0.25f, 0.65f, -1, 0 };
float mooncolor[] = { 0.6f, 0.6f, 1, 1 };
float eye[3] = { 0, 0, 8 };
float look[3] = { 0, 0, 0 };
float up[3] = { 0, 1, 0 };
float screensize[2] = { (float)screenwidth, (float)screenheight };
float lightclip[2];
float clipplanes[2];
float orient[2];
// setup camera
cameraangle.smooth(orient, alpha);
GLMatrixRotationAxis(view, orient[1], 1, 0, 0);
GLMatrixRotationAxis(tmp, orient[0], 0, 1, 0);
GLMatrixMultiply(view, view, tmp);
GLVec3Transform(eye, eye, view);
GLFitToBox(clipplanes[0], clipplanes[1], eye, look, scenebox);
GLMatrixPerspectiveFovRH(proj, (60.0f * 3.14159f) / 180.f, (float)screenwidth / (float)screenheight, clipplanes[0], clipplanes[1]);
GLMatrixLookAtRH(view, eye, look, up);
GLMatrixMultiply(viewproj, view, proj);
// setup moonlight
GLMatrixInverse(viewinv, view);
GLVec3Transform(moonlight, moonlight, viewinv);
GLVec3Normalize(moonlight, moonlight);
// should be that value in view space (background is fix)
// but let y stay in world space, so we see shadow
moonlight[1] = 0.65f;
GLMatrixViewVector(lightview, moonlight);
GLFitToBox(lightproj, lightclip, lightview, scenebox);
GLMatrixMultiply(lightviewproj, lightview, lightproj);
// render shadow map
glClearColor(0, 0, 0, 1);
varianceshadow->SetMatrix("matViewProj", lightviewproj);
varianceshadow->SetVector("clipPlanes", lightclip);
shadowmap->Set();
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
varianceshadow->Begin();
{
RenderScene(varianceshadow);
}
varianceshadow->End();
}
shadowmap->Unset();
// blur it
float texelsize[] = { 1.0f / SHADOWMAP_SIZE, 1.0f / SHADOWMAP_SIZE };
glDepthMask(GL_FALSE);
glBindTexture(GL_TEXTURE_2D, shadowmap->GetColorAttachment(0));
boxblur3x3->SetVector("texelSize", texelsize);
blurredshadow->Set();
{
boxblur3x3->Begin();
{
screenquad->Draw();
}
boxblur3x3->End();
}
blurredshadow->Unset();
glDepthMask(GL_TRUE);
// STEP 1: z pass
ambient->SetMatrix("matViewProj", viewproj);
ambient->SetVector("matAmbient", globalambient);
framebuffer->Set();
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
// draw background first
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glBindTexture(GL_TEXTURE_2D, texture3);
float scaledx = 1360.0f * (screenheight / 768.0f);
float scale = screenwidth / scaledx;
GLMatrixTranslation(tmp, -0.5f, 0, 0);
GLMatrixScaling(texmat, scale, 1, 1);
GLMatrixMultiply(texmat, tmp, texmat);
GLMatrixTranslation(tmp, 0.5f, 0, 0);
GLMatrixMultiply(texmat, texmat, tmp);
GLMatrixRotationAxis(tmp, M_PI, 0, 0, 1);
GLMatrixMultiply(texmat, texmat, tmp);
basic2D->SetMatrix("matTexture", texmat);
basic2D->Begin();
{
screenquad->Draw();
}
basic2D->End();
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
// then fill zbuffer
ambient->Begin();
{
RenderScene(ambient);
}
ambient->End();
}
framebuffer->Unset();
// STEP 2: cull lights
if( lightcull && timeout > DELAY )
{
lightcull->SetFloat("alpha", alpha);
lightcull->SetVector("clipPlanes", clipplanes);
lightcull->SetVector("screenSize", screensize);
lightcull->SetMatrix("matProj", proj);
lightcull->SetMatrix("matView", view);
lightcull->SetMatrix("matViewProj", viewproj);
glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, counterbuffer);
GLuint* counter = (GLuint*)glMapBuffer(GL_ATOMIC_COUNTER_BUFFER, GL_WRITE_ONLY);
*counter = 0;
glUnmapBuffer(GL_ATOMIC_COUNTER_BUFFER);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, headbuffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, nodebuffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, lightbuffer);
glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, counterbuffer);
glBindTexture(GL_TEXTURE_2D, framebuffer->GetDepthAttachment());
lightcull->Begin();
{
glDispatchCompute(workgroupsx, workgroupsy, 1);
}
lightcull->End();
glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, 0);
glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, 0);
glBindTexture(GL_TEXTURE_2D, 0);
}
// STEP 3: add some moonlight with shadow
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
glDepthMask(GL_FALSE);
framebuffer->Set();
shadowedlight->SetMatrix("matViewProj", viewproj);
shadowedlight->SetMatrix("lightViewProj", lightviewproj);
shadowedlight->SetVector("eyePos", eye);
shadowedlight->SetVector("lightPos", moonlight);
shadowedlight->SetVector("lightColor", mooncolor);
shadowedlight->SetVector("clipPlanes", lightclip);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, blurredshadow->GetColorAttachment(0));
glActiveTexture(GL_TEXTURE0);
shadowedlight->Begin();
{
RenderScene(shadowedlight);
}
shadowedlight->End();
// STEP 4: accumulate lighting
if( lightaccum && timeout > DELAY )
{
lightaccum->SetMatrix("matViewProj", viewproj);
lightaccum->SetVector("eyePos", eye);
lightaccum->SetFloat("alpha", alpha);
lightaccum->SetInt("numTilesX", workgroupsx);
lightaccum->Begin();
{
RenderScene(lightaccum);
}
lightaccum->End();
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, 0);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, 0);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, 0);
}
framebuffer->Unset();
glDisable(GL_BLEND);
glDepthMask(GL_TRUE);
// STEP 4: gamma correct
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glBindTexture(GL_TEXTURE_2D, framebuffer->GetColorAttachment(0));
gammacorrect->Begin();
{
screenquad->Draw();
}
gammacorrect->End();
#ifdef _DEBUG
// check errors
GLenum err = glGetError();
if( err != GL_NO_ERROR )
std::cout << "Error\n";
#endif
SwapBuffers(hdc);
mousedx = mousedy = 0;
}
bool InitScene()
{
SetWindowText(hwnd, TITLE);
Quadron::qGLExtensions::QueryFeatures(hdc);
hascompute = (Quadron::qGLExtensions::ARB_compute_shader && Quadron::qGLExtensions::ARB_shader_storage_buffer_object);
#ifdef _DEBUG
if( Quadron::qGLExtensions::ARB_debug_output )
{
glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, 0, GL_TRUE);
glDebugMessageCallback(ReportGLError, 0);
}
#endif
glClearColor(0.0f, 0.125f, 0.3f, 1.0f);
glClearDepth(1.0);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glDepthFunc(GL_LEQUAL);
glEnable(GL_DEPTH_TEST);
// load objects
if( !GLCreateMeshFromQM("../media/meshes/teapot.qm", &teapot) )
{
MYERROR("Could not load teapot");
return false;
}
if( !GLCreateMeshFromQM("../media/meshes/cube.qm", &box) )
{
MYERROR("Could not load box");
return false;
}
// calculate scene bounding box
OpenGLAABox tmpbox;
float world[16];
float tmp[16];
GLMatrixIdentity(world);
for( int i = 0; i < numobjects; ++i )
{
const SceneObject& obj = objects[i];
// scaling * rotation * translation
GLMatrixScaling(tmp, obj.scale[0], obj.scale[1], obj.scale[2]);
GLMatrixRotationAxis(world, obj.angle, 0, 1, 0);
GLMatrixMultiply(world, tmp, world);
GLMatrixTranslation(tmp, obj.position[0], obj.position[1], obj.position[2]);
GLMatrixMultiply(world, world, tmp);
if( obj.type == 0 )
tmpbox = box->GetBoundingBox();
else if( obj.type == 1 )
tmpbox = teapot->GetBoundingBox();
tmpbox.TransformAxisAligned(world);
scenebox.Add(tmpbox.Min);
scenebox.Add(tmpbox.Max);
}
// create render targets
framebuffer = new OpenGLFramebuffer(screenwidth, screenheight);
framebuffer->AttachTexture(GL_COLOR_ATTACHMENT0, GLFMT_A16B16G16R16F);
framebuffer->AttachTexture(GL_DEPTH_ATTACHMENT, GLFMT_D32F);
if( !framebuffer->Validate() )
return false;
shadowmap = new OpenGLFramebuffer(SHADOWMAP_SIZE, SHADOWMAP_SIZE);
shadowmap->AttachTexture(GL_COLOR_ATTACHMENT0, GLFMT_G32R32F, GL_LINEAR);
shadowmap->AttachRenderbuffer(GL_DEPTH_ATTACHMENT, GLFMT_D24S8);
if( !shadowmap->Validate() )
return false;
blurredshadow = new OpenGLFramebuffer(SHADOWMAP_SIZE, SHADOWMAP_SIZE);
blurredshadow->AttachTexture(GL_COLOR_ATTACHMENT0, GLFMT_G32R32F, GL_LINEAR);
if( !blurredshadow->Validate() )
return false;
screenquad = new OpenGLScreenQuad();
// textures
if( !GLCreateTextureFromFile("../media/textures/wood2.jpg", true, &texture1) )
{
MYERROR("Could not load texture");
return false;
}
if( !GLCreateTextureFromFile("../media/textures/marble2.png", true, &texture2) )
{
MYERROR("Could not load texture");
return false;
}
if( !GLCreateTextureFromFile("../media/textures/static_sky.jpg", true, &texture3, GLTEX_FLIPX) )
{
MYERROR("Could not load texture");
return false;
}
// create buffers
workgroupsx = (screenwidth + (screenwidth % 16)) / 16;
workgroupsy = (screenheight + (screenheight % 16)) / 16;
size_t numtiles = workgroupsx * workgroupsy;
size_t headsize = 16; // start, count, pad, pad
size_t nodesize = 16; // light index, next, pad, pad
if( hascompute )
{
glGenBuffers(1, &headbuffer);
glGenBuffers(1, &nodebuffer);
glGenBuffers(1, &lightbuffer);
glGenBuffers(1, &counterbuffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, headbuffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, numtiles * headsize, 0, GL_STATIC_DRAW);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, nodebuffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, numtiles * nodesize * 1024, 0, GL_STATIC_DRAW); // 4 MB
glBindBuffer(GL_SHADER_STORAGE_BUFFER, lightbuffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, NUM_LIGHTS * sizeof(LightParticle), 0, GL_DYNAMIC_DRAW);
UpdateParticles(0, true);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, counterbuffer);
glBufferData(GL_ATOMIC_COUNTER_BUFFER, sizeof(GLuint), 0, GL_DYNAMIC_DRAW);
glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, 0);
}
// load effects
if( !GLCreateEffectFromFile("../media/shadersGL/basic2D.vert", 0, "../media/shadersGL/basic2D.frag", &basic2D) )
{
MYERROR("Could not load basic 2D shader");
return false;
}
if( !GLCreateEffectFromFile("../media/shadersGL/basic2D.vert", 0, "../media/shadersGL/boxblur3x3.frag", &boxblur3x3) )
{
MYERROR("Could not load blur shader");
return false;
}
if( !GLCreateEffectFromFile("../media/shadersGL/basic2D.vert", 0, "../media/shadersGL/gammacorrect.frag", &gammacorrect) )
{
MYERROR("Could not load gamma correction shader");
return false;
}
if( !GLCreateEffectFromFile("../media/shadersGL/shadowmap_variance.vert", 0, "../media/shadersGL/shadowmap_variance.frag", &varianceshadow) )
{
MYERROR("Could not load shadowmap shader");
return false;
}
if( !GLCreateEffectFromFile("../media/shadersGL/blinnphong_variance.vert", 0, "../media/shadersGL/blinnphong_variance.frag", &shadowedlight) )
{
MYERROR("Could not load shadowed light shader");
return false;
}
if( !GLCreateEffectFromFile("../media/shadersGL/ambient.vert", 0, "../media/shadersGL/ambient.frag", &ambient) )
{
MYERROR("Could not load ambient shader");
return false;
}
if( hascompute )
{
// light accumulation shader
if( !GLCreateEffectFromFile("../media/shadersGL/lightaccum.vert", 0, "../media/shadersGL/lightaccum.frag", &lightaccum) )
{
MYERROR("Could not load light accumulation shader");
return false;
}
// light culling shader
if( !GLCreateComputeProgramFromFile("../media/shadersGL/lightcull.comp", &lightcull) )
{
MYERROR("Could not load light culling shader");
return false;
}
lightcull->SetInt("depthSampler", 0);
lightcull->SetInt("numLights", NUM_LIGHTS);
lightaccum->SetInt("sampler0", 0);
}
float white[] = { 1, 1, 1, 1 };
shadowedlight->SetVector("matSpecular", white);
shadowedlight->SetInt("sampler0", 0);
shadowedlight->SetInt("sampler1", 1);
boxblur3x3->SetInt("sampler0", 0);
basic2D->SetInt("sampler0", 0);
gammacorrect->SetInt("sampler0", 0);
float angles[2] = { 0.25f, -0.7f };
cameraangle = angles;
return true;
}
