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Merge pull request #30357 from simonpuchert/spheres

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Particles / CPUParticles: Return uniform density spheres.
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Rémi Verschelde 2019-07-07 11:04:46 +02:00 committed by GitHub
commit 1fa26b969c
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 10 additions and 4 deletions
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5
scene/2d/cpu_particles_2d.cpp
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@ -661,8 +661,9 @@ void CPUParticles2D::_particles_process(float p_delta) {
//do none
} break;
case EMISSION_SHAPE_SPHERE: {
Vector3 sphere_shape = Vector3(Math::randf() * 2.0 - 1.0, Math::randf() * 2.0 - 1.0, Math::randf() * 2.0 - 1.0).normalized() * emission_sphere_radius;
p.transform[2] = Vector2(sphere_shape.x, sphere_shape.y);
float s = Math::randf(), t = 2.0 * Math_PI * Math::randf();
float radius = emission_sphere_radius * Math::sqrt(1.0 - s * s);
p.transform[2] = Vector2(Math::cos(t), Math::sin(t)) * radius;
} break;
case EMISSION_SHAPE_RECTANGLE: {
p.transform[2] = Vector2(Math::randf() * 2.0 - 1.0, Math::randf() * 2.0 - 1.0) * emission_rect_extents;

4
scene/3d/cpu_particles.cpp
View file

@ -643,7 +643,9 @@ void CPUParticles::_particles_process(float p_delta) {
//do none
} break;
case EMISSION_SHAPE_SPHERE: {
p.transform.origin = Vector3(Math::randf() * 2.0 - 1.0, Math::randf() * 2.0 - 1.0, Math::randf() * 2.0 - 1.0).normalized() * emission_sphere_radius;
float s = 2.0 * Math::randf() - 1.0, t = 2.0 * Math_PI * Math::randf();
float radius = emission_sphere_radius * Math::sqrt(1.0 - s * s);
p.transform.origin = Vector3(radius * Math::cos(t), radius * Math::sin(t), emission_sphere_radius * s);
} break;
case EMISSION_SHAPE_BOX: {
p.transform.origin = Vector3(Math::randf() * 2.0 - 1.0, Math::randf() * 2.0 - 1.0, Math::randf() * 2.0 - 1.0) * emission_box_extents;

5
scene/resources/particles_material.cpp
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@ -332,7 +332,10 @@ void ParticlesMaterial::_update_shader() {
//do none
} break;
case EMISSION_SHAPE_SPHERE: {
code += " TRANSFORM[3].xyz = normalize(vec3(rand_from_seed(alt_seed) * 2.0 - 1.0, rand_from_seed(alt_seed) * 2.0 - 1.0, rand_from_seed(alt_seed) * 2.0 - 1.0)) * emission_sphere_radius;\n";
code += " float s = rand_from_seed(alt_seed) * 2.0 - 1.0;\n";
code += " float t = rand_from_seed(alt_seed) * 2.0 * pi;\n";
code += " float radius = emission_sphere_radius * sqrt(1.0 - s * s);\n";
code += " TRANSFORM[3].xyz = vec3(radius * cos(t), radius * sin(t), emission_sphere_radius * s);\n";
} break;
case EMISSION_SHAPE_BOX: {
code += " TRANSFORM[3].xyz = vec3(rand_from_seed(alt_seed) * 2.0 - 1.0, rand_from_seed(alt_seed) * 2.0 - 1.0, rand_from_seed(alt_seed) * 2.0 - 1.0) * emission_box_extents;\n";