ilikecats/stk-code_catmod
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GPUParticle: Fix some parameters not used correctly.

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Some previous value (like dt) came from debug attempt.
This fixes the particles behind the wheels of the wagon in minel.

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14848 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
vincentlj 2013-12-31 00:58:42 +00:00
parent 43f4d1cdfb
commit 8670aa86dc
3 changed files with 18 additions and 7 deletions
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4
data/shaders/pointemitter.vert
View File

@ -14,8 +14,8 @@ out vec4 new_particle_velocity;
void main(void)
{
vec4 initialposition = sourcematrix * vec4(0., 0., 0., 1.0);
new_particle_position = (lifetime > 0.) ? particle_position + particle_velocity.xyz * float(dt) : initialposition.xyz;
new_lifetime = (lifetime > 0.) ? lifetime - float(dt) : float(duration);
new_particle_position = (lifetime > 0.) ? particle_position + particle_velocity.xyz * float(dt) : initialposition.xyz - particle_velocity.xyz * lifetime;
new_lifetime = (lifetime > 0.) ? lifetime - float(dt) : float(duration) - lifetime;
new_particle_velocity = particle_velocity;
gl_Position = vec4(0.);
}

19
src/graphics/gpuparticles.cpp
View File

@ -239,10 +239,10 @@ void ParticleSystemProxy::setEmitter(scene::IParticleEmitter* emitter)
// Pass a fake material type to force irrlicht to update its internal states on rendering
setMaterialType(irr_driver->getShader(ES_RAIN));
setAutomaticCulling(0);
LastEmitTime = 0;
initGL();
count = emitter->getMaxParticlesPerSecond();
duration = emitter->getMaxLifeTime();
float initial_lifetime_incr = 1000.;
count = emitter->getMaxParticlesPerSecond() * duration / 1000;
const char *varyings[] = {
"new_particle_position",
"new_lifetime",
@ -258,7 +258,7 @@ void ParticleSystemProxy::setEmitter(scene::IParticleEmitter* emitter)
loc_position = glGetAttribLocation(SimulationProgram, "particle_position");
loc_lifetime = glGetAttribLocation(SimulationProgram, "lifetime");
loc_velocity = glGetAttribLocation(SimulationProgram, "particle_velocity");
printf("count:%d\nduration:%d\ninitial_lifetine:%f\n", count, duration, initial_lifetime_incr);
printf("count:%d\nduration:%d\n", count, duration);
RenderProgram = LoadProgram(file_manager->getAsset("shaders/particle.vert").c_str(), file_manager->getAsset("shaders/particle.frag").c_str());
loc_matrix = glGetUniformLocation(RenderProgram, "matrix");
@ -293,6 +293,17 @@ void ParticleSystemProxy::setEmitter(scene::IParticleEmitter* emitter)
void ParticleSystemProxy::simulate()
{
unsigned time = os::Timer::getTime();
if (LastEmitTime == 0)
{
LastEmitTime = time;
return;
}
u32 now = time;
u32 timediff = time - LastEmitTime;
LastEmitTime = time;
core::matrix4 matrix = getAbsoluteTransformation();
glUseProgram(SimulationProgram);
glEnable(GL_RASTERIZER_DISCARD);
@ -305,7 +316,7 @@ void ParticleSystemProxy::simulate()
glVertexAttribPointer(loc_velocity, 4, GL_FLOAT, GL_FALSE, COMPONENTCOUNT * sizeof(float), (GLvoid*)(4 * sizeof(float)));
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, tfb_buffers[1]);
glUniform1i(loc_dt, 1);
glUniform1i(loc_dt, timediff);
glUniform1i(loc_duration, duration);
glUniformMatrix4fv(loc_sourcematrix, 1, GL_FALSE, matrix.pointer());
glBeginTransformFeedback(GL_POINTS);

2
src/graphics/gpuparticles.h
View File

@ -34,7 +34,7 @@ protected:
GLuint loc_position, loc_velocity, loc_lifetime;
GLuint tfb_buffers[2];
GLuint texture, normal_and_depth;
unsigned duration, count;
unsigned duration, count, LastEmitTime;
virtual void simulate();
virtual void draw();