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Pre-generate some particles if max count is small

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This commit is contained in:
Benau 2017-10-14 14:42:24 +08:00
parent a0c9ba2b8c
commit c3a22ddcf7
4 changed files with 30 additions and 18 deletions
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2
data/shaders/alphatest_particle.vert
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@ -19,7 +19,7 @@ in vec2 lifetime_and_size;
in vec2 Texcoord;
in vec2 quadcorner;
float anglespeed;
in float anglespeed;
#endif
out vec2 tc;

2
data/shaders/simple_particle.vert
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@ -19,7 +19,7 @@ in vec2 lifetime_and_size;
in vec2 Texcoord;
in vec2 quadcorner;
float anglespeed;
in float anglespeed;
#endif
out vec2 tc;

42
src/graphics/stk_particle.cpp
View File

@ -255,16 +255,26 @@ void STKParticle::generate(std::vector<CPUParticle>* out)
}
Buffer->BoundingBox.reset(AbsoluteTransformation.getTranslation());
int active_count = getEmitter()->getMaxLifeTime() *
getEmitter()->getMaxParticlesPerSecond() / 1000;
if (m_first_execution)
{
m_previous_frame_matrix = AbsoluteTransformation;
for (int i = 0; i < (m_max_count > 5000 ? 5 : 100); i++)
{
if (m_hm != NULL)
{
stimulateHeightMap(i, active_count, NULL);
}
else
{
stimulateNormal(i, active_count, NULL);
}
}
m_first_execution = false;
}
float dt = GUIEngine::getLatestDt() * 1000.f;
int active_count = getEmitter()->getMaxLifeTime() *
getEmitter()->getMaxParticlesPerSecond() / 1000;
if (m_hm != NULL)
{
stimulateHeightMap(dt, active_count, out);
@ -350,14 +360,15 @@ void STKParticle::stimulateHeightMap(float dt, unsigned int active_count,
m_particles_generating[i].m_lifetime = new_lifetime;
m_particles_generating[i].m_direction = new_particle_direction;
m_particles_generating[i].m_size = new_size;
if (m_flips || new_size != 0.0f)
if (out != NULL)
{
if (new_size != 0.0f)
{
Buffer->BoundingBox.addInternalPoint(new_particle_position);
}
if (out != NULL)
if (m_flips || new_size != 0.0f)
{
if (new_size != 0.0f)
{
Buffer->BoundingBox.addInternalPoint
(new_particle_position);
}
out->emplace_back(new_particle_position, m_color_from,
m_color_to, new_lifetime, new_size);
}
@ -455,14 +466,15 @@ void STKParticle::stimulateNormal(float dt, unsigned int active_count,
m_particles_generating[i].m_lifetime = new_lifetime;
m_particles_generating[i].m_direction = new_particle_direction;
m_particles_generating[i].m_size = new_size;
if (m_flips || new_size != 0.0f)
if (out != NULL)
{
if (new_size != 0.0f)
{
Buffer->BoundingBox.addInternalPoint(new_particle_position);
}
if (out != NULL)
if (m_flips || new_size != 0.0f)
{
if (new_size != 0.0f)
{
Buffer->BoundingBox.addInternalPoint
(new_particle_position);
}
out->emplace_back(new_particle_position, m_color_from,
m_color_to, new_lifetime, new_size);
}

2
src/graphics/stk_particle.hpp
View File

@ -67,7 +67,7 @@ private:
/** Previous frame particles emitter source matrix */
core::matrix4 m_previous_frame_matrix;
/** Maximum count of particles. */
unsigned m_max_count;