void Game::DisplayFrameRate()
{
CShaderProgram *fontProgram = (*m_pShaderPrograms)[1];
RECT dimensions = m_gameWindow.GetDimensions();
int height = dimensions.bottom - dimensions.top;
// Increase the elapsed time and frame counter
m_elapsedTime += m_dt;
m_frameCount++;
// Now we want to subtract the current time by the last time that was stored
// to see if the time elapsed has been over a second, which means we found our FPS.
if (m_elapsedTime > 1000)
{
m_elapsedTime = 0;
m_framesPerSecond = m_frameCount;
// Reset the frames per second
m_frameCount = 0;
}
if (m_framesPerSecond > 0) {
// Use the font shader program and render the text
fontProgram->UseProgram();
glDisable(GL_DEPTH_TEST);
fontProgram->SetUniform("matrices.modelViewMatrix", glm::mat4(1));
fontProgram->SetUniform("matrices.projMatrix", m_pCamera->GetOrthographicProjectionMatrix());
fontProgram->SetUniform("vColour", glm::vec4(1.0f, 1.0f, 1.0f, 1.0f));
m_pFtFont->Render(20, height - 20, 20, "FPS: %d", m_framesPerSecond);
}
}
// Render method runs repeatedly in a loop
void Game::Render()
{
// Clear the buffers and enable depth testing (z-buffering)
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
// Set up a matrix stack
glutil::MatrixStack modelViewMatrixStack;
modelViewMatrixStack.SetIdentity();
modelViewMatrixStack.LookAt(m_pCamera->GetPosition(), m_pCamera->GetView(), m_pCamera->GetUpVector());
// Use the main shader program
CShaderProgram *pMainProgram = (*m_pShaderPrograms)[0];
pMainProgram->UseProgram();
// Set light and materials in main shader program
glm::vec4 vPosition(-100, 100, 50, 1);
glm::mat3 normalMatrix = m_pCamera->ComputeNormalMatrix(modelViewMatrixStack.Top());
glm::vec4 vLightEye = modelViewMatrixStack.Top()*vPosition;
pMainProgram->SetUniform("light1.position", vLightEye); // Position of light source in eye coordinates
pMainProgram->SetUniform("light1.La", glm::vec3(0.15f, 0.15f, 0.15f));
pMainProgram->SetUniform("light1.Ld", glm::vec3(1.0f, 1.0f, 1.0f));
pMainProgram->SetUniform("light1.Ls", glm::vec3(1.0f, 1.0f, 1.0f));
pMainProgram->SetUniform("material1.Ma", glm::vec3(0.5f, 0.5f, 0.5f));
pMainProgram->SetUniform("material1.Md", glm::vec3(0.5f, 0.5f, 0.5f));
pMainProgram->SetUniform("material1.Ms", glm::vec3(0.5f, 0.5f, 0.5f));
pMainProgram->SetUniform("material1.shininess", 15.0f);
pMainProgram->SetUniform("bUseTexture", false);
pMainProgram->SetUniform("sampler0", 0);
// Render the grid
modelViewMatrixStack.Push();
pMainProgram->SetUniform("matrices.projMatrix", m_pCamera->GetPerspectiveProjectionMatrix());
pMainProgram->SetUniform("matrices.modelViewMatrix", modelViewMatrixStack.Top());
pMainProgram->SetUniform("matrices.normalMatrix", m_pCamera->ComputeNormalMatrix(modelViewMatrixStack.Top()));
m_pGrid->Render();
modelViewMatrixStack.Pop();
// Switch to the sphere program
CShaderProgram *pSphereProgram = (*m_pShaderPrograms)[2];
pSphereProgram->UseProgram();
// Set light and materials in sphere programme
pSphereProgram->SetUniform("material1.Ma", glm::vec3(0.0f, 1.0f, 0.0f));
pSphereProgram->SetUniform("material1.Md", glm::vec3(0.0f, 1.0f, 0.0f));
pSphereProgram->SetUniform("material1.Ms", glm::vec3(1.0f, 1.0f, 1.0f));
pSphereProgram->SetUniform("material1.shininess", 50.0f);
pSphereProgram->SetUniform("light1.La", glm::vec3(0.15f, 0.15f, 0.15f));
pSphereProgram->SetUniform("light1.Ld", glm::vec3(1.0f, 1.0f, 1.0f));
pSphereProgram->SetUniform("light1.Ls", glm::vec3(1.0f, 1.0f, 1.0f));
pSphereProgram->SetUniform("light1.position", vLightEye);
// Render the sphere
modelViewMatrixStack.Push();
modelViewMatrixStack.Translate(glm::vec3(0.0f, 5.0f, 50.0f));
modelViewMatrixStack.Scale(5.0f);
pSphereProgram->SetUniform("matrices.projMatrix", m_pCamera->GetPerspectiveProjectionMatrix());
pSphereProgram->SetUniform("matrices.modelViewMatrix", modelViewMatrixStack.Top());
pSphereProgram->SetUniform("matrices.normalMatrix", m_pCamera->ComputeNormalMatrix(modelViewMatrixStack.Top()));
pSphereProgram->SetUniform("t",m_elapsedTime);
pSphereProgram->SetUniform("levels",m_levels);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
m_pSphere->Render();
modelViewMatrixStack.Pop();
#ifdef __WIN32
void swapBuffers();
#endif
#ifdef __APPLE__
glSwapAPPLE();
#endif
}
void CSDLOpenGLWindow::RenderScene()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glm::mat4 mModelView = cCamera.look();
glm::mat4 mCurrent = mModelView;
// First render textured objects
glEnable(GL_TEXTURE_2D);
spTextured.UseProgram();
glBindVertexArray(uiVAOs[0]);
spTextured.SetUniform("projectionMatrix", GetProjectionMatrix());
spTextured.SetUniform("modelViewMatrix", mModelView);
spTextured.SetUniform("vColor", glm::vec4(1, 1, 1, 1));
// Render ground
tBlueIce.BindTexture();
glDrawArrays(GL_TRIANGLES, 36, 6);
// Render 5 opaque boxes
tBox.BindTexture();
for (int i = 0; i < 5; i++)
{
float fSign = -1.0f + float(i % 2)*2.0f; // This just returns -1.0f or 1.0f (try to examine this)
glm::vec3 vPos = glm::vec3(fSign*15.0f, 0.0f, 50.0f - float(i)*25.0f);
mCurrent = glm::translate(mModelView, vPos);
mCurrent = glm::scale(mCurrent, glm::vec3(8.0f, 8.0f, 8.0f));
mCurrent = glm::rotate(mCurrent, fGlobalAngle + float(i)*50.0f* PIover180, glm::vec3(0.0f, 1.0f, 0.0f));
spTextured.SetUniform("modelViewMatrix", mCurrent);
glDrawArrays(GL_TRIANGLES, 0, 36);
}
// Now switch to only colored rendering
glDisable(GL_TEXTURE_2D);
spColored.UseProgram();
glBindVertexArray(uiVAOs[1]);
spColored.SetUniform("projectionMatrix", GetProjectionMatrix());
// Render 5 transparent boxes
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask(0); // Disable writing to depth buffer
for (int i = 0; i < 5; i++)
{
float fSign = 1.0f - float(i % 2)*2.0f; // Same case as before - -1.0f or 1.0f
glm::vec3 vPos = glm::vec3(fSign*15.0f, 0.0f, 50.0f - float(i)*25.0f);
mCurrent = glm::translate(mModelView, vPos);
mCurrent = glm::scale(mCurrent, glm::vec3(8.0f, 8.0f, 8.0f));
mCurrent = glm::rotate(mCurrent, fGlobalAngle*0.8f + i*30.0f*PIover180, glm::vec3(1.0f, 0.0f, 0.0f)); // Just a variation of first rotating
spColored.SetUniform("modelViewMatrix", mCurrent);
spColored.SetUniform("vColor", vBoxColors[i]);
glDrawArrays(GL_TRIANGLES, 0, 36);
}
glDisable(GL_BLEND);
glDepthMask(1); // Re-enable writing to depth buffer
fGlobalAngle += sof(100.0f*PIover180);
cCamera.Update(this);
}
void CSDLOpenGLWindow::RenderScene()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_TEXTURE_2D);
spDirectionalLight.UseProgram();
glBindVertexArray(uiVAOs[0]);
// Set light properties
float fSine = sin(fSunAngle*PIover180);
glm::vec3 vSunPos(cos(fSunAngle*PIover180) * 70, sin(fSunAngle*PIover180) * 70, 0.0);
// We'll change color of skies depending on sun's position
glClearColor(0.0f, std::max(0.0f, 0.9f*fSine), std::max(0.0f, 0.9f*fSine), 1.0f);
spDirectionalLight.SetUniform("sunLight.vColor", glm::vec3(1.0f, 1.0f, 1.0f));
spDirectionalLight.SetUniform("sunLight.fAmbientIntensity", 0.25f);
spDirectionalLight.SetUniform("sunLight.fStrength", 1.0f);
spDirectionalLight.SetUniform("sunLight.vDirection", -glm::normalize(vSunPos));
spDirectionalLight.SetUniform("projectionMatrix", GetProjectionMatrix());
glm::mat4 mView = cCamera.look();
glm::mat4 mModel(1.0);
spDirectionalLight.SetUniform("gSampler", 0);
spDirectionalLight.SetUniform("modelViewMatrix", mView*mModel);
spDirectionalLight.SetUniform("normalMatrix", glm::transpose(glm::inverse(glm::mat3(mModel))));
spDirectionalLight.SetUniform("vColor", glm::vec4(1.0f, 1.0f, 1.0f, 1.0f));
// Render ground
tTextures[0].BindTexture();
glDrawArrays(GL_TRIANGLES, 36, 6);
tTextures[1].BindTexture();
for (int i = 0; i < 5; i++)
{
float fSign = -1.0f + float(i % 2)*2.0f; // This just returns -1.0f or 1.0f (try to examine this)
glm::vec3 vPos = glm::vec3(fSign*15.0f, 0.0f, 50.0f - float(i)*25.0f);
mModel = glm::translate(glm::mat4(1.0), vPos);
mModel = glm::scale(mModel, glm::vec3(8.0f, 8.0f, 8.0f));
// We need to trasnsform normals properly, it's done by transpose of inverse matrix of rotations and scales
spDirectionalLight.SetUniform("normalMatrix", glm::transpose(glm::inverse(glm::mat3(mModel))));
spDirectionalLight.SetUniform("modelViewMatrix", mView*mModel);
glDrawArrays(GL_TRIANGLES, 0, 36);
}
// Render 5 tori (plural of torus :D)
tTextures[2].BindTexture();
for (int i = 0; i < 5; i++)
{
float fSign = 1.0f - float(i % 2)*2.0f; // This just returns -1.0f or 1.0f (try to examine this)
glm::vec3 vPos = glm::vec3(fSign*15.0f, 0.0f, 50.0f - float(i)*25.0f);
mModel = glm::translate(glm::mat4(1.0), vPos);
mModel = glm::rotate(mModel, fGlobalAngle + i*30.0f, glm::vec3(0.0f, 1.0f, 0.0f));
spDirectionalLight.SetUniform("normalMatrix", glm::transpose(glm::inverse(glm::mat3(mModel))));
spDirectionalLight.SetUniform("modelViewMatrix", mView*mModel);
glDrawArrays(GL_TRIANGLES, 42, iTorusFaces1 * 3);
}
tTextures[3].BindTexture();
// Render "sun" :D
mModel = glm::translate(glm::mat4(1.0), vSunPos);
spDirectionalLight.SetUniform("modelViewMatrix", mView*mModel);
spDirectionalLight.SetUniform("normalMatrix", glm::transpose(glm::inverse(glm::mat3(mModel))));
// It must shine
spDirectionalLight.SetUniform("sunLight.fAmbientIntensity", 0.8f);
glDrawArrays(GL_TRIANGLES, 42 + iTorusFaces1 * 3, iTorusFaces2 * 3);
fGlobalAngle += sof(100.0f*PIover180);
cCamera.Update(this);
if (Keys::Key(SDL_SCANCODE_LEFT))fSunAngle -= sof(45.0f);
if (Keys::Key(SDL_SCANCODE_RIGHT))fSunAngle += sof(45.0f);
}
// Render method runs repeatedly in a loop
void Game::Render()
{
// Clear the buffers and enable depth testing (z-buffering)
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
// Set up a matrix stack
glutil::MatrixStack modelViewMatrixStack;
modelViewMatrixStack.SetIdentity();
// Use the main shader program
CShaderProgram *pMainProgram = (*m_pShaderPrograms)[0];
pMainProgram->UseProgram();
pMainProgram->SetUniform("bUseTexture", false);
pMainProgram->SetUniform("sampler0", 0);
pMainProgram->SetUniform("CubeMapTex", 1);
// Set the projection matrix
pMainProgram->SetUniform("matrices.projMatrix", m_pCamera->GetPerspectiveProjectionMatrix());
// Call LookAt to create the view matrix and put this on the modelViewMatrix stack.
// Store the view matrix and the normal matrix associated with the view matrix for later (they're useful for lighting -- since lighting is done in eye coordinates)
modelViewMatrixStack.LookAt(m_pCamera->GetPosition(), m_pCamera->GetView(), m_pCamera->GetUpVector());
glm::mat4 viewMatrix = modelViewMatrixStack.Top();
glm::mat3 viewNormalMatrix = m_pCamera->ComputeNormalMatrix(viewMatrix);
// Set light and materials in main shader program
glm::vec4 lightPosition1 = glm::vec4(-100, 100, 50, 1); // Position of light source *in world coordinates*
pMainProgram->SetUniform("light1.position", viewMatrix*lightPosition1); // Position of light source *in eye coordinates*
pMainProgram->SetUniform("light1.La", glm::vec3(0.15f)); // Ambient colour of light
pMainProgram->SetUniform("light1.Ld", glm::vec3(1.0f)); // Diffuse colour of light
pMainProgram->SetUniform("light1.Ls", glm::vec3(1.0f)); // Specular colour of light
pMainProgram->SetUniform("material1.Ma", glm::vec3(0.5f)); // Ambient material reflectance
pMainProgram->SetUniform("material1.Md", glm::vec3(0.5f)); // Diffuse material reflectance
pMainProgram->SetUniform("material1.Ms", glm::vec3(0.5f)); // Specular material reflectance
pMainProgram->SetUniform("material1.shininess", 15.0f); // Shininess material property
// Render the grid
modelViewMatrixStack.Push(); {
pMainProgram->SetUniform("matrices.modelViewMatrix", modelViewMatrixStack.Top());
pMainProgram->SetUniform("matrices.normalMatrix", m_pCamera->ComputeNormalMatrix(modelViewMatrixStack.Top()));
m_pGrid->Render();
} modelViewMatrixStack.Pop();
// Switch to the sphere program
CShaderProgram *pSphereProgram = (*m_pShaderPrograms)[2];
pSphereProgram->UseProgram();
// Set light and materials in sphere programme
pSphereProgram->SetUniform("material1.Ma", glm::vec3(0.0f, 1.0f, 0.0f));
pSphereProgram->SetUniform("material1.Md", glm::vec3(0.0f, 1.0f, 0.0f));
pSphereProgram->SetUniform("material1.Ms", glm::vec3(1.0f, 1.0f, 1.0f));
pSphereProgram->SetUniform("material1.shininess", 50.0f);
pSphereProgram->SetUniform("light1.La", glm::vec3(0.15f, 0.15f, 0.15f));
pSphereProgram->SetUniform("light1.Ld", glm::vec3(1.0f, 1.0f, 1.0f));
pSphereProgram->SetUniform("light1.Ls", glm::vec3(1.0f, 1.0f, 1.0f));
pSphereProgram->SetUniform("light1.position", viewMatrix*lightPosition1);
pSphereProgram->SetUniform("t", m_t);
pSphereProgram->SetUniform("iLevel", m_levels);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// Render the sphere
modelViewMatrixStack.Push(); {
modelViewMatrixStack.Translate(glm::vec3(0.0f, 5.0f, 50.0f));
modelViewMatrixStack.Scale(5.0f);
pSphereProgram->SetUniform("matrices.projMatrix", m_pCamera->GetPerspectiveProjectionMatrix());
pSphereProgram->SetUniform("matrices.modelViewMatrix", modelViewMatrixStack.Top());
pSphereProgram->SetUniform("matrices.normalMatrix", m_pCamera->ComputeNormalMatrix(modelViewMatrixStack.Top()));
m_pSphere->Render();
} modelViewMatrixStack.Pop();
// Draw the 2D graphics after the 3D graphics
DisplayFrameRate();
// Swap buffers to show the rendered image
SwapBuffers(m_gameWindow.Hdc());
}