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Implemented dust particle system

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--HG--
extra : convert_revision : svn%3A7752d6cf-9f14-4ad2-affc-04f1e67b81a5/trunk%40164
This commit is contained in:
kearwood
2012-11-23 01:02:22 +00:00
parent 230dd4722d
commit 96a9c02a13
19 changed files with 165 additions and 39 deletions
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40
KREngine/KREngine/Classes/KRModelManager.cpp
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@@ -255,9 +255,9 @@ void KRModelManager::rotateBuffers(bool new_frame)
KRModelManager::VolumetricLightingVertexData *KRModelManager::getVolumetricLightingVertexes()
{
if(m_volumetricLightingVertexData == NULL) {
m_volumetricLightingVertexData = (VolumetricLightingVertexData *)malloc(sizeof(VolumetricLightingVertexData) * MAX_VOLUMETRIC_PLANES * 6);
m_volumetricLightingVertexData = (VolumetricLightingVertexData *)malloc(sizeof(VolumetricLightingVertexData) * KRENGINE_MAX_VOLUMETRIC_PLANES * 6);
int iVertex=0;
for(int iPlane=0; iPlane < MAX_VOLUMETRIC_PLANES; iPlane++) {
for(int iPlane=0; iPlane < KRENGINE_MAX_VOLUMETRIC_PLANES; iPlane++) {
m_volumetricLightingVertexData[iVertex].vertex.x = -1.0f;
m_volumetricLightingVertexData[iVertex].vertex.y = -1.0f;
m_volumetricLightingVertexData[iVertex].vertex.z = iPlane;
@@ -300,31 +300,35 @@ KRModelManager::VolumetricLightingVertexData *KRModelManager::getVolumetricLight
KRModelManager::RandomParticleVertexData *KRModelManager::getRandomParticles()
{
const int MAX_PARTICLES=500000;
if(m_randomParticleVertexData == NULL) {
m_randomParticleVertexData = (RandomParticleVertexData *)malloc(sizeof(RandomParticleVertexData) * MAX_PARTICLES * 3);
m_randomParticleVertexData = (RandomParticleVertexData *)malloc(sizeof(RandomParticleVertexData) * KRENGINE_MAX_RANDOM_PARTICLES * 3);
// Generate vertices for randomly placed equilateral triangles with a side length of 1 and an origin point centered so that an inscribed circle can be efficiently rendered without wasting fill
float equilateral_triangle_height = sqrt(3.0f) / 2.0f;
float inscribed_circle_radius = 1.0f / (2.0f * sqrt(3.0f));
int iVertex=0;
for(int iParticle=0; iParticle < MAX_PARTICLES; iParticle++) {
m_randomParticleVertexData[iVertex].vertex.x = (float)(arc4random() % 2000) / 1000.0f - 1.0f;
m_randomParticleVertexData[iVertex].vertex.y = (float)(arc4random() % 2000) / 1000.0f - 1.0f;
m_randomParticleVertexData[iVertex].vertex.z = (float)(arc4random() % 2000) / 1000.0f - 1.0f;
m_randomParticleVertexData[iVertex].uva.u = 0.0f;
m_randomParticleVertexData[iVertex].uva.v = 0.0f;
iVertex++;
m_randomParticleVertexData[iVertex].vertex.x = m_randomParticleVertexData[iVertex-1].vertex.x;
m_randomParticleVertexData[iVertex].vertex.y = m_randomParticleVertexData[iVertex-1].vertex.y;
m_randomParticleVertexData[iVertex].vertex.z = m_randomParticleVertexData[iVertex-1].vertex.z;
m_randomParticleVertexData[iVertex].uva.u = 1.0f;
m_randomParticleVertexData[iVertex].uva.v = 0.0f;
for(int iParticle=0; iParticle < KRENGINE_MAX_RANDOM_PARTICLES; iParticle++) {
m_randomParticleVertexData[iVertex].vertex.x = (float)(arc4random() % 2000) / 1000.0f - 1000.0f;
m_randomParticleVertexData[iVertex].vertex.y = (float)(arc4random() % 2000) / 1000.0f - 1000.0f;
m_randomParticleVertexData[iVertex].vertex.z = (float)(arc4random() % 2000) / 1000.0f - 1000.0f;
m_randomParticleVertexData[iVertex].uva.u = -0.5f;
m_randomParticleVertexData[iVertex].uva.v = -inscribed_circle_radius;
iVertex++;
m_randomParticleVertexData[iVertex].vertex.x = m_randomParticleVertexData[iVertex-1].vertex.x;
m_randomParticleVertexData[iVertex].vertex.y = m_randomParticleVertexData[iVertex-1].vertex.y;
m_randomParticleVertexData[iVertex].vertex.z = m_randomParticleVertexData[iVertex-1].vertex.z;
m_randomParticleVertexData[iVertex].uva.u = 0.5f;
m_randomParticleVertexData[iVertex].uva.v = 1.0f;
m_randomParticleVertexData[iVertex].uva.v = -inscribed_circle_radius;
iVertex++;
m_randomParticleVertexData[iVertex].vertex.x = m_randomParticleVertexData[iVertex-1].vertex.x;
m_randomParticleVertexData[iVertex].vertex.y = m_randomParticleVertexData[iVertex-1].vertex.y;
m_randomParticleVertexData[iVertex].vertex.z = m_randomParticleVertexData[iVertex-1].vertex.z;
m_randomParticleVertexData[iVertex].uva.u = 0.0f;
m_randomParticleVertexData[iVertex].uva.v = -inscribed_circle_radius + equilateral_triangle_height;
iVertex++;
}
}