// Draw 3d stuff
void TemplateGame::_draw3d()
{
glEnable( GL_TEXTURE_2D );
// Set up basic shader
glUseProgram( m_basicShader );
GLint mvp = glGetUniformLocation( m_basicShader, "matrixPMV");
glUniformMatrix4fv( mvp, 1, 0, (GLfloat*)(&m_modelviewProj) );
glActiveTexture(GL_TEXTURE0 );
glBindTexture( GL_TEXTURE_2D, m_simpleTex.textureId );
GLint paramTex = glGetUniformLocation( m_basicShader, "sampler_dif0" );
glUniform1i( paramTex, 0 );
// Draw something
_drawMesh( m_cube );
}
void GLWidget::paintGL()
{
ErrorChecker::printGLErrors("start of paintGL");
if (resetFromSceneEditorGroomingTexture != NULL && resetFromSceneEditorGrowthTexture != NULL){
applySceneEditor(resetFromSceneEditorGrowthTexture, resetFromSceneEditorGroomingTexture);
resetFromSceneEditorGroomingTexture = NULL;
resetFromSceneEditorGrowthTexture = NULL;
}
m_clock.restart();
_resizeDepthPeelFramebuffers();
// Update simulation if not paused.
if (!isPaused())
{
m_increment++;
float time = m_increment / (float) m_targetFPS; // Time in seconds (assuming 60 FPS).
m_testSimulation->update(time);
m_hairObject->update(time);
}
// Update transformation matrices.
glm::mat4 model = glm::mat4(1.f);
model = m_testSimulation->m_xform;
m_lightPosition = glm::vec3(2, 2, 2);
glm::mat4 lightProjection = glm::perspective(1.3f, 1.f, .1f, 100.f);
glm::mat4 lightView = glm::lookAt(m_lightPosition, glm::vec3(0), glm::vec3(0,1,0));
m_eyeToLight = lightProjection * lightView * glm::inverse(m_view);
// Bind textures.
m_noiseTexture->bind(GL_TEXTURE0);
m_hairShadowFramebuffer->depthTexture->bind(GL_TEXTURE1);
m_opacityMapFramebuffer->colorTexture->bind(GL_TEXTURE2);
m_meshShadowFramebuffer->depthTexture->bind(GL_TEXTURE3);
m_finalFramebuffer->colorTexture->bind(GL_TEXTURE4);
m_hairObject->m_blurredHairGrowthMapTexture->bind(GL_TEXTURE5);
m_depthPeel0Framebuffer->depthTexture->bind(GL_TEXTURE6);
m_depthPeel0Framebuffer->colorTexture->bind(GL_TEXTURE7);
m_depthPeel1Framebuffer->colorTexture->bind(GL_TEXTURE8);
#if FEEDBACK
int numTriangles =
m_hairObject->m_guideHairs.size() // # guide hairs
* m_hairObject->m_numGroupHairs // # hairs per guide hair
* (m_hairObject->m_numSplineVertices-1) // # segments per hair
* 2; // # triangles per segment
m_tessellator->setNumTriangles(numTriangles);
m_tessellator->beginTessellation();
_drawHair(m_tessellator->program, model, m_view, m_projection, false);
m_tessellator->endTessellation();
#endif
if (useShadows)
{
// Render hair shadow map.
m_hairShadowFramebuffer->bind();
glViewport(0, 0, m_hairShadowFramebuffer->depthTexture->width(), m_hairShadowFramebuffer->depthTexture->height());
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
#if FEEDBACK
_drawHairFromFeedback(m_TFwhiteHairProgram, model, lightView, lightProjection);
#else
_drawHair(m_whiteHairProgram, model, lightView, lightProjection);
#endif
// Render mesh shadow map.
m_meshShadowFramebuffer->bind();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
_drawMesh(m_whiteMeshProgram, model, lightView, lightProjection);
// Enable additive blending for opacity map.
glDisable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
glBlendEquation(GL_FUNC_ADD);
// Render opacity map.
m_opacityMapFramebuffer->bind();
glViewport(0, 0, m_hairShadowFramebuffer->depthTexture->width(), m_hairShadowFramebuffer->depthTexture->height());
glClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
#if FEEDBACK
_drawHairFromFeedback(m_TFhairOpacityProgram, model, lightView, lightProjection);
#else
_drawHair(m_hairOpacityProgram, model, lightView, lightProjection);
#endif
// Restore previous state.
m_opacityMapFramebuffer->unbind();
glEnable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
}
if (useTransparency)
{
glViewport(0, 0, m_depthPeel0Framebuffer->colorTexture->width(), m_depthPeel0Framebuffer->colorTexture->height());
glClearColor(0.5f, 0.5f, 0.5f, 0.0f);
// Draw first (front-most) depth peeling layer.
m_depthPeel0Framebuffer->bind();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
#if FEEDBACK
_drawHairFromFeedback(m_TFhairProgram, model, m_view, m_projection);
#else
_drawHair(m_hairProgram, model, m_view, m_projection);
#endif
_drawMesh(m_meshProgram, model, m_view, m_projection);
// Draw second depth peeling layer.
m_depthPeel1Framebuffer->bind();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
#if FEEDBACK
_drawHairFromFeedback(m_TFhairDepthPeelProgram, model, m_view, m_projection);
#else
_drawHair(m_hairDepthPeelProgram, model, m_view, m_projection);
#endif
_drawMesh(m_meshDepthPeelProgram, model, m_view, m_projection);
// Render farthest layer to screen.
m_depthPeel1Framebuffer->unbind();
glViewport(0, 0, width(), height());
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDisable(GL_DEPTH_TEST);
m_depthPeel1Framebuffer->colorTexture->renderFullScreen();
// Blend closer layers on top.
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
m_depthPeel0Framebuffer->colorTexture->renderFullScreen();
glDisable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
}
else
{
if (useSupersampling)
{
// Render into supersample framebuffer.
m_finalFramebuffer->bind();
glViewport(0, 0, m_finalFramebuffer->colorTexture->width(), m_finalFramebuffer->colorTexture->height());
}
else
{
// Render into default framebuffer...
glViewport(0, 0, width(), height());
}
// Render scene.
glClearColor(0.5f, 0.5f, 0.5f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
#if FEEDBACK
_drawHairFromFeedback(m_TFhairProgram, model, m_view, m_projection);
#else
_drawHair(m_hairProgram, model, m_view, m_projection);
#endif
_drawMesh(m_meshProgram, model, m_view, m_projection);
if (useSupersampling)
{
// Render supersampled texture.
m_finalFramebuffer->unbind();
glViewport(0, 0, width(), height());
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_finalFramebuffer->colorTexture->renderFullScreen();
}
}
// Clean up.
m_noiseTexture->unbind(GL_TEXTURE0);
m_hairShadowFramebuffer->depthTexture->unbind(GL_TEXTURE1);
m_opacityMapFramebuffer->colorTexture->unbind(GL_TEXTURE2);
m_meshShadowFramebuffer->depthTexture->unbind(GL_TEXTURE3);
m_finalFramebuffer->colorTexture->unbind(GL_TEXTURE4);
m_hairObject->m_blurredHairGrowthMapTexture->unbind(GL_TEXTURE5);
m_depthPeel0Framebuffer->depthTexture->bind(GL_TEXTURE6);
m_depthPeel0Framebuffer->colorTexture->bind(GL_TEXTURE7);
m_depthPeel1Framebuffer->colorTexture->bind(GL_TEXTURE8);
// Update UI.
m_hairInterface->updateFPSLabel(m_increment);
if (m_paused || m_pausedLastFrame)
{
m_hairInterface->updateFPSLabelPaused(1000.0 / m_clock.elapsed());
}
m_pausedLastFrame = isPaused();
}
