ilikecats/stk-code_catmod
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GPUParticles: Fix adjusted_initial_velocity computation.

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Thank to Auria and hiker for their help.

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14947 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
vincentlj 2014-01-07 00:04:43 +00:00
parent 6e3466c838
commit 51023ceb81
3 changed files with 2 additions and 10 deletions
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4
data/shaders/pointemitter.vert
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@ -1,7 +1,6 @@
#version 130
uniform int dt;
uniform mat4 sourcematrix;
uniform mat4 tinvsourcematrix;
uniform int level;
uniform float size_increase_factor;
@ -23,8 +22,7 @@ out float new_size;
void main(void)
{
vec4 initialposition = sourcematrix * vec4(particle_position_initial, 1.0);
vec4 adjusted_initial_velocity = tinvsourcematrix * vec4(particle_velocity_initial, 1.0);
adjusted_initial_velocity /= adjusted_initial_velocity.w;
vec4 adjusted_initial_velocity = sourcematrix * vec4(particle_position_initial + particle_velocity_initial, 1.0) - initialposition;
float adjusted_lifetime = lifetime + (float(dt)/lifetime_initial);
bool reset = (adjusted_lifetime > 1.) && (gl_VertexID <= level);
reset = reset || (lifetime < 0.);

6
src/graphics/gpuparticles.cpp
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@ -240,7 +240,6 @@ GLuint ParticleSystemProxy::attrib_initial_lifetime;
GLuint ParticleSystemProxy::attrib_size;
GLuint ParticleSystemProxy::attrib_initial_size;
GLuint ParticleSystemProxy::uniform_sourcematrix;
GLuint ParticleSystemProxy::uniform_tinvsourcematrix;
GLuint ParticleSystemProxy::uniform_dt;
GLuint ParticleSystemProxy::uniform_level;
GLuint ParticleSystemProxy::uniform_size_increase_factor;
@ -315,7 +314,6 @@ void ParticleSystemProxy::setEmitter(scene::IParticleEmitter* emitter)
uniform_dt = glGetUniformLocation(SimulationProgram, "dt");
uniform_sourcematrix = glGetUniformLocation(SimulationProgram, "sourcematrix");
uniform_tinvsourcematrix = glGetUniformLocation(SimulationProgram, "tinvsourcematrix");
uniform_level = glGetUniformLocation(SimulationProgram, "level");
uniform_size_increase_factor = glGetUniformLocation(SimulationProgram, "size_increase_factor");
@ -356,9 +354,6 @@ void ParticleSystemProxy::simulate()
LastEmitTime = time;
int active_count = getEmitter()->getMaxLifeTime() * getEmitter()->getMaxParticlesPerSecond() / 1000;
core::matrix4 matrix = getAbsoluteTransformation();
core::matrix4 tinvmatrix;
matrix.getInverse(tinvmatrix);
tinvmatrix = tinvmatrix.getTransposed();
glUseProgram(SimulationProgram);
glEnable(GL_RASTERIZER_DISCARD);
glEnableVertexAttribArray(attrib_position);
@ -384,7 +379,6 @@ void ParticleSystemProxy::simulate()
glUniform1i(uniform_dt, timediff);
glUniform1i(uniform_level, active_count);
glUniformMatrix4fv(uniform_sourcematrix, 1, GL_FALSE, matrix.pointer());
glUniformMatrix4fv(uniform_tinvsourcematrix, 1, GL_FALSE, tinvmatrix.pointer());
glUniform1f(uniform_size_increase_factor, size_increase_factor);
glBeginTransformFeedback(GL_POINTS);
glDrawArrays(GL_POINTS, 0, count);

2
src/graphics/gpuparticles.h
View File

@ -33,7 +33,7 @@ protected:
static GLuint SimulationProgram;
static GLuint attrib_position, attrib_velocity, attrib_lifetime, attrib_initial_position, attrib_initial_velocity, attrib_initial_lifetime, attrib_size, attrib_initial_size;
static GLuint uniform_sourcematrix, uniform_tinvsourcematrix, uniform_dt, uniform_level, uniform_size_increase_factor;
static GLuint uniform_sourcematrix, uniform_dt, uniform_level, uniform_size_increase_factor;
static GLuint RenderProgram;
static GLuint attrib_pos, attrib_lf, attrib_quadcorner, attrib_texcoord, attrib_sz;