// draw slice of particles from light's point of view
void VHParticlesRender::drawSliceLightView(int i)
{
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadMatrixf((GLfloat *) lightView.get_value());
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadMatrixf((GLfloat *) lightProj.get_value());
lightFbo->bind();
glViewport(0, 0, lightBufferSize, lightBufferSize);
//int db;
//glGetIntegerv ( GL_DRAW_BUFFER, &db );
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_COLOR);
shadowMapSpriteProg->enable();
shadowMapSpriteProg->setUniform1f("pointRadius",pointSize);
shadowMapSpriteProg->setUniform4f("uShadowColor", colorAttenuation.x,colorAttenuation.y,colorAttenuation.z,shadowAlpha);
shadowMapSpriteProg->bindTexture("sDiffuseMap", TextureManager::Inst()->m_texID[id1],GL_TEXTURE_2D,0);
drawPointSprites(i*batchSize, batchSize);
shadowMapSpriteProg->disable();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
void VHParticlesRender::drawSlice(int i)
{
imageFbo->bind();
glViewport(0, 0, width*resMul, height*resMul);
//int db;
//glGetIntegerv ( GL_DRAW_BUFFER, &db );
if (invertedView) {
// front-to-back
glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_ONE);
} else {
// back-to-front
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
}
shadowedSpriteProg->enable();
shadowedSpriteProg->setUniform1f("pointRadius",pointSize);
shadowedSpriteProg->bindTexture("sDiffuseMap", TextureManager::Inst()->m_texID[id1],GL_TEXTURE_2D,0);
shadowedSpriteProg->bindTexture("shadowTex", lightTex[srcLightTexture], GL_TEXTURE_2D, 1);
drawPointSprites(i*batchSize, batchSize);
shadowedSpriteProg->disable();
}
// draw slice of particles from light's point of view
void SmokeRenderer::drawSliceLightView(int i)
{
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadMatrixf((GLfloat *) m_lightView.get_value());
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadMatrixf((GLfloat *) m_lightProj.get_value());
m_lightFbo->Bind();
glViewport(0, 0, m_lightBufferSize, m_lightBufferSize);
glColor4f(m_colorAttenuation[0] * m_shadowAlpha, m_colorAttenuation[1] * m_shadowAlpha, m_colorAttenuation[2] * m_shadowAlpha, 1.0);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_COLOR);
drawPointSprites(m_particleProg, i*m_batchSize, m_batchSize, false);
m_lightFbo->Disable();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
void SmokeRenderer::render()
{
switch(mDisplayMode) {
case POINTS:
glColor3f(1.0, 1.0, 1.0);
m_simpleProg->enable();
drawPoints(0, mNumParticles, false);
m_simpleProg->disable();
break;
case SPRITES:
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_COLOR);
glColor4f(1.0, 1.0, 1.0, m_spriteAlpha);
drawPointSprites(m_particleProg, 0, mNumParticles, false);
break;
case VOLUMETRIC:
drawSlices();
compositeResult();
break;
case NUM_MODES:
break;
}
if (m_displayLightBuffer) {
// display light buffer to screen
glViewport(0, 0, m_lightBufferSize, m_lightBufferSize);
glDisable(GL_DEPTH_TEST);
displayTexture(m_lightTexture[m_srcLightTexture]);
glViewport(0, 0, mWindowW, mWindowH);
}
glutReportErrors();
}
// draw slice of particles from camera view
void SmokeRenderer::drawSlice(int i)
{
m_imageFbo->Bind();
glViewport(0, 0, m_imageW, m_imageH);
glColor4f(1.0, 1.0, 1.0, m_spriteAlpha);
if (m_invertedView) {
// front-to-back
glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_ONE);
} else {
// back-to-front
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
}
drawPointSprites(m_particleShadowProg, i*m_batchSize, m_batchSize, true);
m_imageFbo->Disable();
}
