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Code Releases Wiki Activity

Implement GPU Particle Collisions

Browse Source 
-Sphere Attractor
-Box Attractor
-Vector Field
-Sphere Collider
-Box Collider
-Baked SDF Collider
-Heightmap Collider
This commit is contained in:
reduz
2020-10-07 21:29:49 -03:00
parent c35005ba25
commit 26f5bd245c
32 changed files with 2947 additions and 102 deletions
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98
scene/resources/particles_material.cpp
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@@ -98,6 +98,9 @@ void ParticlesMaterial::init_shaders() {
shader_names->sub_emitter_frequency = "sub_emitter_frequency";
shader_names->sub_emitter_amount_at_end = "sub_emitter_amount_at_end";
shader_names->sub_emitter_keep_velocity = "sub_emitter_keep_velocity";
shader_names->collision_friction = "collision_friction";
shader_names->collision_bounce = "collision_bounce";
}
void ParticlesMaterial::finish_shaders() {
@@ -136,6 +139,10 @@ void ParticlesMaterial::_update_shader() {
String code = "shader_type particles;\n";
if (collision_scale) {
code += "render_mode collision_use_scale;\n";
}
code += "uniform vec3 direction;\n";
code += "uniform float spread;\n";
code += "uniform float flatness;\n";
@@ -247,6 +254,11 @@ void ParticlesMaterial::_update_shader() {
code += "uniform sampler2D anim_offset_texture;\n";
}
if (collision_enabled) {
code += "uniform float collision_friction;\n";
code += "uniform float collision_bounce;\n";
}
//need a random function
code += "\n\n";
code += "float rand_from_seed(inout uint seed) {\n";
@@ -476,6 +488,10 @@ void ParticlesMaterial::_update_shader() {
code += " vec3 crossDiff = cross(normalize(diff), normalize(gravity));\n";
code += " force += length(crossDiff) > 0.0 ? normalize(crossDiff) * ((tangent_accel + tex_tangent_accel) * mix(1.0, rand_from_seed(alt_seed), tangent_accel_random)) : vec3(0.0);\n";
}
if (attractor_interaction_enabled) {
code += " force += ATTRACTOR_FORCE;\n\n";
}
code += " // apply attractor forces\n";
code += " VELOCITY += force * DELTA;\n";
code += " // orbit velocity\n";
@@ -599,6 +615,13 @@ void ParticlesMaterial::_update_shader() {
code += " VELOCITY.z = 0.0;\n";
code += " TRANSFORM[3].z = 0.0;\n";
}
if (collision_enabled) {
code += " if (COLLIDED) {\n";
code += " TRANSFORM[3].xyz+=COLLISION_NORMAL * COLLISION_DEPTH;\n";
code += " VELOCITY -= COLLISION_NORMAL * dot(COLLISION_NORMAL, VELOCITY) * (1.0 + collision_bounce);\n";
code += " VELOCITY = mix(VELOCITY,vec3(0.0),collision_friction * DELTA * 100.0);\n";
code += " }\n";
}
if (sub_emitter_mode != SUB_EMITTER_DISABLED) {
code += " int emit_count = 0;\n";
switch (sub_emitter_mode) {
@@ -609,6 +632,7 @@ void ParticlesMaterial::_update_shader() {
} break;
case SUB_EMITTER_AT_COLLISION: {
//not implemented yet
code += " if (COLLIDED) emit_count = 1;\n";
} break;
case SUB_EMITTER_AT_END: {
//not implemented yet
@@ -1072,6 +1096,51 @@ bool ParticlesMaterial::get_sub_emitter_keep_velocity() const {
return sub_emitter_keep_velocity;
}
void ParticlesMaterial::set_attractor_interaction_enabled(bool p_enable) {
attractor_interaction_enabled = p_enable;
_queue_shader_change();
}
bool ParticlesMaterial::is_attractor_interaction_enabled() const {
return attractor_interaction_enabled;
}
void ParticlesMaterial::set_collision_enabled(bool p_enabled) {
collision_enabled = p_enabled;
_queue_shader_change();
}
bool ParticlesMaterial::is_collision_enabled() const {
return collision_enabled;
}
void ParticlesMaterial::set_collision_use_scale(bool p_scale) {
collision_scale = p_scale;
_queue_shader_change();
}
bool ParticlesMaterial::is_collision_using_scale() const {
return collision_scale;
}
void ParticlesMaterial::set_collision_friction(float p_friction) {
collision_friction = p_friction;
RenderingServer::get_singleton()->material_set_param(_get_material(), shader_names->collision_friction, p_friction);
}
float ParticlesMaterial::get_collision_friction() const {
return collision_friction;
}
void ParticlesMaterial::set_collision_bounce(float p_bounce) {
collision_bounce = p_bounce;
RenderingServer::get_singleton()->material_set_param(_get_material(), shader_names->collision_bounce, p_bounce);
}
float ParticlesMaterial::get_collision_bounce() const {
return collision_bounce;
}
Shader::Mode ParticlesMaterial::get_shader_mode() const {
return Shader::MODE_PARTICLES;
}
@@ -1143,6 +1212,21 @@ void ParticlesMaterial::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_sub_emitter_keep_velocity"), &ParticlesMaterial::get_sub_emitter_keep_velocity);
ClassDB::bind_method(D_METHOD("set_sub_emitter_keep_velocity", "enable"), &ParticlesMaterial::set_sub_emitter_keep_velocity);
ClassDB::bind_method(D_METHOD("set_attractor_interaction_enabled", "enabled"), &ParticlesMaterial::set_attractor_interaction_enabled);
ClassDB::bind_method(D_METHOD("is_attractor_interaction_enabled"), &ParticlesMaterial::is_attractor_interaction_enabled);
ClassDB::bind_method(D_METHOD("set_collision_enabled", "enabled"), &ParticlesMaterial::set_collision_enabled);
ClassDB::bind_method(D_METHOD("is_collision_enabled"), &ParticlesMaterial::is_collision_enabled);
ClassDB::bind_method(D_METHOD("set_collision_use_scale", "radius"), &ParticlesMaterial::set_collision_use_scale);
ClassDB::bind_method(D_METHOD("is_collision_using_scale"), &ParticlesMaterial::is_collision_using_scale);
ClassDB::bind_method(D_METHOD("set_collision_friction", "friction"), &ParticlesMaterial::set_collision_friction);
ClassDB::bind_method(D_METHOD("get_collision_friction"), &ParticlesMaterial::get_collision_friction);
ClassDB::bind_method(D_METHOD("set_collision_bounce", "bounce"), &ParticlesMaterial::set_collision_bounce);
ClassDB::bind_method(D_METHOD("get_collision_bounce"), &ParticlesMaterial::get_collision_bounce);
ADD_GROUP("Time", "");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "lifetime_randomness", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_lifetime_randomness", "get_lifetime_randomness");
@@ -1221,6 +1305,14 @@ void ParticlesMaterial::_bind_methods() {
ADD_PROPERTY(PropertyInfo(Variant::INT, "sub_emitter_amount_at_end", PROPERTY_HINT_RANGE, "1,32,1"), "set_sub_emitter_amount_at_end", "get_sub_emitter_amount_at_end");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "sub_emitter_keep_velocity"), "set_sub_emitter_keep_velocity", "get_sub_emitter_keep_velocity");
ADD_GROUP("Attractor Interaction", "attractor_interaction_");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "attractor_interaction_enabled"), "set_attractor_interaction_enabled", "is_attractor_interaction_enabled");
ADD_GROUP("Collision", "collision_");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "collision_enabled"), "set_collision_enabled", "is_collision_enabled");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "collision_friction", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_collision_friction", "get_collision_friction");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "collision_bounce", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_collision_bounce", "get_collision_bounce");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "collision_use_scale"), "set_collision_use_scale", "is_collision_using_scale");
BIND_ENUM_CONSTANT(PARAM_INITIAL_LINEAR_VELOCITY);
BIND_ENUM_CONSTANT(PARAM_ANGULAR_VELOCITY);
BIND_ENUM_CONSTANT(PARAM_ORBIT_VELOCITY);
@@ -1283,6 +1375,12 @@ ParticlesMaterial::ParticlesMaterial() :
set_sub_emitter_amount_at_end(1);
set_sub_emitter_keep_velocity(false);
set_attractor_interaction_enabled(true);
set_collision_enabled(true);
set_collision_bounce(0.0);
set_collision_friction(0.0);
set_collision_use_scale(false);
for (int i = 0; i < PARAM_MAX; i++) {
set_param_randomness(Parameter(i), 0);
}