glm::vec4 CalcLightPosition(const Framework::Timer &timer, float alphaOffset)
{
const float fLoopDuration = 5.0f;
const float fScale = 3.14159f * 2.0f;
float timeThroughLoop = timer.GetAlpha() + alphaOffset;
glm::vec4 ret(0.0f, g_fLightHeight, 0.0f, 1.0f);
ret.x = cosf(timeThroughLoop * fScale) * g_fLightRadius;
ret.z = sinf(timeThroughLoop * fScale) * g_fLightRadius;
return ret;
}
//Called to update the display.
//You should call glutSwapBuffers after all of your rendering to display what you rendered.
//If you need continuous updates of the screen, call glutPostRedisplay() at the end of the function.
void display()
{
if(!g_pScene)
return;
g_timer.Update();
glClearColor(0.8f, 0.8f, 0.8f, 1.0f);
glClearDepth(1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glutil::MatrixStack modelMatrix;
modelMatrix *= g_viewPole.CalcMatrix();
BuildLights(modelMatrix.Top());
g_nodes[0].NodeSetOrient(glm::rotate(glm::fquat(),
360.0f * g_timer.GetAlpha(), glm::vec3(0.0f, 1.0f, 0.0f)));
g_nodes[3].NodeSetOrient(g_spinBarOrient * glm::rotate(glm::fquat(),
360.0f * g_timer.GetAlpha(), glm::vec3(0.0f, 0.0f, 1.0f)));
glm::ivec2 displaySize(g_displayWidth / 2, g_displayHeight);
{
glutil::MatrixStack persMatrix;
persMatrix.Perspective(60.0f, (displaySize.x / (float)displaySize.y), g_fzNear, g_fzFar);
ProjectionBlock projData;
projData.cameraToClipMatrix = persMatrix.Top();
glBindBuffer(GL_UNIFORM_BUFFER, g_projectionUniformBuffer);
glBufferData(GL_UNIFORM_BUFFER, sizeof(ProjectionBlock), &projData, GL_STREAM_DRAW);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
}
glViewport(0, 0, (GLsizei)displaySize.x, (GLsizei)displaySize.y);
g_pScene->Render(modelMatrix.Top());
if(g_bDrawCameraPos)
{
glutil::PushStack stackPush(modelMatrix);
//Draw lookat point.
modelMatrix.SetIdentity();
modelMatrix.Translate(glm::vec3(0.0f, 0.0f, -g_viewPole.GetView().radius));
modelMatrix.Scale(0.5f);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glUseProgram(g_unlitProg);
glUniformMatrix4fv(g_unlitModelToCameraMatrixUnif, 1, GL_FALSE,
glm::value_ptr(modelMatrix.Top()));
glUniform4f(g_unlitObjectColorUnif, 0.25f, 0.25f, 0.25f, 1.0f);
g_pSphereMesh->Render("flat");
glDepthMask(GL_TRUE);
glEnable(GL_DEPTH_TEST);
glUniform4f(g_unlitObjectColorUnif, 1.0f, 1.0f, 1.0f, 1.0f);
g_pSphereMesh->Render("flat");
}
{
glutil::MatrixStack persMatrix;
persMatrix.ApplyMatrix(glm::mat4(glm::mat3(g_persViewPole.CalcMatrix())));
persMatrix.Perspective(60.0f, (displaySize.x / (float)displaySize.y), g_fzNear, g_fzFar);
ProjectionBlock projData;
projData.cameraToClipMatrix = persMatrix.Top();
glBindBuffer(GL_UNIFORM_BUFFER, g_projectionUniformBuffer);
glBufferData(GL_UNIFORM_BUFFER, sizeof(ProjectionBlock), &projData, GL_STREAM_DRAW);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
}
if(!g_bDepthClampProj)
glDisable(GL_DEPTH_CLAMP);
glViewport(displaySize.x + (g_displayWidth % 2), 0,
(GLsizei)displaySize.x, (GLsizei)displaySize.y);
g_pScene->Render(modelMatrix.Top());
glEnable(GL_DEPTH_CLAMP);
glutPostRedisplay();
glutSwapBuffers();
}
//Called to update the display.
//You should call glutSwapBuffers after all of your rendering to display what you rendered.
//If you need continuous updates of the screen, call glutPostRedisplay() at the end of the function.
void display()
{
if(!g_pScene)
return;
g_timer.Update();
glClearColor(0.8f, 0.8f, 0.8f, 1.0f);
glClearDepth(1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
const glm::mat4 &cameraMatrix = g_viewPole.CalcMatrix();
const glm::mat4 &lightView = g_lightPole.CalcMatrix();
glutil::MatrixStack modelMatrix;
modelMatrix *= cameraMatrix;
BuildLights(cameraMatrix);
g_nodes[0].NodeSetOrient(glm::rotate(glm::fquat(),
360.0f * g_timer.GetAlpha(), glm::vec3(0.0f, 1.0f, 0.0f)));
g_nodes[3].NodeSetOrient(g_spinBarOrient * glm::rotate(glm::fquat(),
360.0f * g_timer.GetAlpha(), glm::vec3(0.0f, 0.0f, 1.0f)));
{
glutil::MatrixStack persMatrix;
persMatrix.Perspective(60.0f, (g_displayWidth / (float)g_displayHeight), g_fzNear, g_fzFar);
ProjectionBlock projData;
projData.cameraToClipMatrix = persMatrix.Top();
glBindBuffer(GL_UNIFORM_BUFFER, g_projectionUniformBuffer);
glBufferData(GL_UNIFORM_BUFFER, sizeof(ProjectionBlock), &projData, GL_STREAM_DRAW);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
}
glActiveTexture(GL_TEXTURE0 + g_lightProjTexUnit);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_lightTextures[g_currTextureIndex]);
glBindSampler(g_lightProjTexUnit, g_samplers[g_currSampler]);
{
glutil::MatrixStack lightProjStack;
lightProjStack.ApplyMatrix(glm::inverse(lightView));
lightProjStack.ApplyMatrix(glm::inverse(cameraMatrix));
g_lightProjMatBinder.SetValue(lightProjStack.Top());
glm::vec4 worldLightPos = lightView[3];
glm::vec3 lightPos = glm::vec3(cameraMatrix * worldLightPos);
g_camLightPosBinder.SetValue(lightPos);
}
glViewport(0, 0, (GLsizei)g_displayWidth, (GLsizei)g_displayHeight);
g_pScene->Render(modelMatrix.Top());
{
//Draw axes
glutil::PushStack stackPush(modelMatrix);
modelMatrix.ApplyMatrix(lightView);
modelMatrix.Scale(15.0f);
glUseProgram(g_colroedProg);
glUniformMatrix4fv(g_coloredModelToCameraMatrixUnif, 1, GL_FALSE,
glm::value_ptr(modelMatrix.Top()));
g_pAxesMesh->Render();
}
if(g_bDrawCameraPos)
{
//Draw lookat point.
glutil::PushStack stackPush(modelMatrix);
modelMatrix.SetIdentity();
modelMatrix.Translate(glm::vec3(0.0f, 0.0f, -g_viewPole.GetView().radius));
modelMatrix.Scale(0.5f);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glUseProgram(g_unlitProg);
glUniformMatrix4fv(g_unlitModelToCameraMatrixUnif, 1, GL_FALSE,
glm::value_ptr(modelMatrix.Top()));
glUniform4f(g_unlitObjectColorUnif, 0.25f, 0.25f, 0.25f, 1.0f);
g_pSphereMesh->Render("flat");
glDepthMask(GL_TRUE);
glEnable(GL_DEPTH_TEST);
glUniform4f(g_unlitObjectColorUnif, 1.0f, 1.0f, 1.0f, 1.0f);
g_pSphereMesh->Render("flat");
}
glActiveTexture(GL_TEXTURE0 + g_lightProjTexUnit);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
glBindSampler(g_lightProjTexUnit, 0);
glutPostRedisplay();
glutSwapBuffers();
}