void FireParticleSystem::Process(float delta_t)
{
UpdateParameters(delta_t);
glUseProgram(m_animateProgram.program); CHECK_GL_ERRORS;
setUniform(m_animateProgram.program, "delta_t", delta_t);
setUniform(m_animateProgram.program, "wind", m_wind);
//setUniform(m_animateProgram.program, "epicenter", float3(0,1,0));
glBindBuffer(GL_TEXTURE_BUFFER, m_posAndSizeBuffers[1-m_currPinPongId]); CHECK_GL_ERRORS;
bindTextureBuffer(m_animateProgram.program, 1, "vertPosBuffer", m_vertexPosTBO); CHECK_GL_ERRORS;
glTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA32F, m_vertexPosTBO); CHECK_GL_ERRORS;
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, m_posAndSizeBuffers[m_currPinPongId]); CHECK_GL_ERRORS;
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 1, m_velAndHPBuffers[m_currPinPongId]); CHECK_GL_ERRORS;
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 2, m_randBuffers[m_currPinPongId]); CHECK_GL_ERRORS;
glEnable(GL_RASTERIZER_DISCARD);
glBeginTransformFeedback(GL_POINTS); CHECK_GL_ERRORS;
glBindVertexArray(m_animVAOs[1-m_currPinPongId]); CHECK_GL_ERRORS;
glDrawArrays(GL_POINTS, 0, m_particlesNum); CHECK_GL_ERRORS;
glBindVertexArray(0);
glEndTransformFeedback(); CHECK_GL_ERRORS;
glDisable(GL_RASTERIZER_DISCARD);
glBindBuffer(GL_TEXTURE_BUFFER, 0);
glBindTexture(GL_TEXTURE_BUFFER, 0);
m_currPinPongId = 1 - m_currPinPongId;
m_lastDeltaTime = delta_t;
}
/*---------------------------------------------*/
void COpenGLTextureBufferObject::initTBOBuffer(int nJointCount, GLenum iUsageHint)
{
m_pRenderDevice->extGlBufferData(GL_TEXTURE_BUFFER, 12 * nJointCount * sizeof(GLfloat), NULL, iUsageHint);
bindTextureBuffer(0);
m_pRenderDevice->extGlTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA32F, m_TBOID);
}
