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Merge pull request #80638 from sepTN/fix-particle-shader-rand

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Fix particle shader deterministic random values
This commit is contained in:
Rémi Verschelde 2023-08-16 09:16:14 +02:00
parent 1d852cb75e cb7400d67a
commit ed1180a97e
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GPG key ID: C3336907360768E1
1 changed files with 4 additions and 2 deletions
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6
scene/resources/particle_process_material.cpp
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@ -683,11 +683,13 @@ void ParticleProcessMaterial::_update_shader() {
code += " pos.z = 0.0;\n";
}
code += " // apply linear acceleration\n";
code += " force += length(VELOCITY) > 0.0 ? normalize(VELOCITY) * tex_linear_accel * mix(linear_accel_min, linear_accel_max, rand_from_seed(alt_seed)) : vec3(0.0);\n";
code += " float linear_accel_rand = rand_from_seed(alt_seed);\n";
code += " force += length(VELOCITY) > 0.0 ? normalize(VELOCITY) * tex_linear_accel * mix(linear_accel_min, linear_accel_max, linear_accel_rand) : vec3(0.0);\n";
code += " // apply radial acceleration\n";
code += " vec3 org = EMISSION_TRANSFORM[3].xyz;\n";
code += " vec3 diff = pos - org;\n";
code += " force += length(diff) > 0.0 ? normalize(diff) * tex_radial_accel * mix(radial_accel_min, radial_accel_max, rand_from_seed(alt_seed)) : vec3(0.0);\n";
code += " float radial_accel_rand = rand_from_seed(alt_seed);\n";
code += " force += length(diff) > 0.0 ? normalize(diff) * tex_radial_accel * mix(radial_accel_min, radial_accel_max, radial_accel_rand) : vec3(0.0);\n";
code += " // apply tangential acceleration;\n";
code += " float tangent_accel_val = tex_tangent_accel * mix(tangent_accel_min, tangent_accel_max, rand_from_seed(alt_seed));\n";
if (particle_flags[PARTICLE_FLAG_DISABLE_Z]) {