j3d1/KlassischeKeplerKriege
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maxAge of particle is now halfAge and it lives for 5*halfAge time.

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This commit is contained in:
Andreas Ortmann 2016-09-30 21:48:15 +02:00
parent a6b9078c21
commit 3a30a20043
5 changed files with 17 additions and 15 deletions
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7
data/shader/particle.frag
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@ -21,14 +21,15 @@ void main()
discard;
}
float d = decay/(1.0+max(0.0, 1.0-explCenterDist));
float d = decay/(1.0+max(0.0, 1.0-2.0*explCenterDist));
float h = (1.0-d)/6.0;
float v = max(0.0, (1.0-log(d)));
float s = 1.0;
float s = max(0.0, min(30.0 * sqrt(decay) * explCenterDist, 1.0));
//v /= decay * 10.0*length(vertex-explCenter);
//v /= 1.0+2.0*length(vertex-explCenter);
v /= 1.0 + max(0.0, min(35.0*(decay-0.2), 1.0)) * 15.0 * explCenterDist;
//v /= 1.0 + max(0.0, min(35.0*(decay-0.2), 1.0)) + 10.0 * explCenterDist;
v /= 1.0 + 10.0 * explCenterDist;
gl_FragColor = vec4(hsv2rgb(vec3(h, s, v)), 1.0);

11
data/shader/particle.vert
View file

@ -6,7 +6,7 @@ attribute vec3 in_velocity;
uniform float age;
uniform float size;
uniform float maxVelocity;
uniform float maxAge;
uniform float halfAge;
uniform vec3 explCenter;
varying float decay;
@ -17,15 +17,16 @@ varying float explCenterDist;
// TODO: rotate to face the user!
void main()
{
//decay = min(1.0, age+5.0*length(velocity)) / maxAge;
//decay = min(1.0, age+5.0*length(velocity)) / halfAge;
//decay = max(decay*decay, sqrt(decay));
decay = age / maxAge;
decay = age / halfAge;
// faster particles are smaller
float s = size * (1.0-length(in_velocity)/maxVelocity);
//float s = size * (1.0-length(in_velocity)/maxVelocity);
float s = size;
vec2 base = in_vertex;
vec3 p = s*vec3(base, 0.0);
vec3 offset = log(1.0+age) * in_velocity + in_position;
vec3 offset = (0.1*age + log(1.0+age*5.0)) * in_velocity + in_position;
p += offset;
gl_Position = vec4(p, 1.0);

8
game/renderer_polygon_3d/particle_batch.cpp
View file

@ -11,11 +11,11 @@ int getDivisorForIndex(int index)
}
namespace endofthejedi {
ParticleBatch::ParticleBatch(size_t id, size_t numParticles, float particleSize, float maxAge)
ParticleBatch::ParticleBatch(size_t id, size_t numParticles, float particleSize, float halfAge)
: m_id(id)
, m_numParticles(numParticles)
, m_particleRadius(particleSize)
, m_maxAge(maxAge)
, m_halfAge(halfAge)
, m_age(0.0)
, m_maxVelocity(1.0)
, m_center(glm::vec3(0.0f, 0.0f, 0.0f))
@ -137,7 +137,7 @@ namespace endofthejedi {
glUniform1f(m_shader.location("age"), m_age);
glUniform1f(m_shader.location("maxVelocity"), m_maxVelocity);
glUniform1f(m_shader.location("maxAge"), m_maxAge);
glUniform1f(m_shader.location("halfAge"), m_halfAge);
glUniform1f(m_shader.location("size"), m_particleRadius);
glUniform3f(m_shader.location("center"), m_center.x, m_center.y, m_center.z);
@ -206,6 +206,6 @@ namespace endofthejedi {
bool ParticleBatch::done() const
{
return m_age >= m_maxAge;
return m_age >= 5.0*m_halfAge;
}
}

4
game/renderer_polygon_3d/particle_batch.hpp
View file

@ -10,7 +10,7 @@
namespace endofthejedi {
class ParticleBatch {
public:
ParticleBatch(size_t id, size_t numParticles, float particleRadius, float maxAge);
ParticleBatch(size_t id, size_t numParticles, float particleRadius, float halfAge);
// deallocate opengl stuff on destroy
~ParticleBatch();
@ -41,7 +41,7 @@ namespace endofthejedi {
size_t m_id;
size_t m_numParticles;
float m_particleRadius;
const float m_maxAge;
const float m_halfAge;
float m_age;
float m_maxVelocity;
glm::vec3 m_center;

2
game/renderer_polygon_3d/renderer_polygon_3d.cpp
View file

@ -119,7 +119,7 @@ namespace endofthejedi {
//glm::vec3 v = 0.5f*glm::vec3(sin(t), cos(t), util::randf_m1_1());
glm::vec3 v = glm::ballRand(maxVelocity);
v *= util::randf_0_1() + util::randf_0_1();
v *= util::randf_0_1() * util::randf_0_1();
batch->setParticle(i, glm::vec3(pos, 0.0) + glm::ballRand(explSize), v);
}