1 files changed, 167 insertions, 0 deletions
diff --git a/drivers/gles3/shaders/particles.glsl b/drivers/gles3/shaders/particles.glsl
new file mode 100644
index 0000000000..e72f12cc5e
--- /dev/null
+++ b/drivers/gles3/shaders/particles.glsl
@@ -0,0 +1,167 @@
+[vertex]
+
+
+
+layout(location=0) in highp vec4 color;
+layout(location=1) in highp vec4 velocity_active;
+layout(location=2) in highp vec4 custom;
+layout(location=3) in highp vec4 xform_1;
+layout(location=4) in highp vec4 xform_2;
+layout(location=5) in highp vec4 xform_3;
+
+
+struct Attractor {
+
+	vec3 pos;
+	vec3 dir;
+	float radius;
+	float eat_radius;
+	float strength;
+	float attenuation;
+};
+
+#define MAX_ATTRACTORS 64
+
+uniform mat4 origin;
+uniform float system_phase;
+uniform float prev_system_phase;
+uniform float total_particles;
+uniform float explosiveness;
+uniform vec4 time;
+uniform float delta;
+uniform vec3 gravity;
+uniform int attractor_count;
+uniform Attractor attractors[MAX_ATTRACTORS];
+
+
+out highp vec4 out_color; //tfb:
+out highp vec4 out_velocity_active; //tfb:
+out highp vec4 out_custom; //tfb:
+out highp vec4 out_xform_1; //tfb:
+out highp vec4 out_xform_2; //tfb:
+out highp vec4 out_xform_3; //tfb:
+
+VERTEX_SHADER_GLOBALS
+
+#if defined(USE_MATERIAL)
+
+layout(std140) uniform UniformData { //ubo:0
+
+MATERIAL_UNIFORMS
+
+};
+
+#endif
+
+void main() {
+
+	bool apply_forces=true;
+	bool apply_velocity=true;
+
+	float mass = 1.0;
+
+	float restart_phase = float(gl_InstanceID)/total_particles;
+	restart_phase*= explosiveness;
+	bool restart=false;
+	bool active = out_velocity_active.a > 0.5;
+
+	if (system_phase > prev_system_phase) {
+		restart = prev_system_phase < restart_phase && system_phase >= restart_phase;
+	} else {
+		restart = prev_system_phase < restart_phase || system_phase >= restart_phase;
+	}
+
+	if (restart) {
+		active=true;
+	}
+
+	out_color=color;
+	out_velocity_active=velocity_active;
+	out_custom=custom;
+
+	mat4 xform = transpose(mat4(xform_1,xform_2,xform_3,vec4(vec3(0.0),1.0)));
+
+
+	out_rot_active=rot_active;
+
+	if (active) {
+		//execute shader
+
+		{
+			VERTEX_SHADER_CODE
+		}
+
+#if !defined(DISABLE_FORCE)
+
+		{
+
+			vec3 force = gravity;
+			for(int i=0;i<attractor_count;i++) {
+
+				vec3 rel_vec = out_pos_lifetime.xyz - attractors[i].pos;
+				float dist = rel_vec.length();
+				if (attractors[i].radius < dist)
+					continue;
+				if (attractors[i].eat_radius>0 &&  attractors[i].eat_radius > dist) {
+					out_velocity_active.a=0.0;
+				}
+
+				rel_vec = normalize(rel_vec);
+
+				float attenuation = pow(dist / attractors[i].radius,attractors[i].attenuation);
+
+				if (attractors[i].dir==vec3(0.0)) {
+					//towards center
+					force+=attractors[i].strength * rel_vec * attenuation * mass;
+				} else {
+					force+=attractors[i].strength * attractors[i].dir * attenuation *mass;
+
+				}
+			}
+
+			out_velocity_seed.xyz += force * delta;
+		}
+#endif
+
+#if !defined(DISABLE_VELOCITY)
+
+		{
+
+			out_pos_lifetime.xyz += out_velocity_seed.xyz * delta;
+		}
+#endif
+	}
+
+	xform = transpose(xform);
+
+	out_velocity_active.a = mix(0.0,1.0,active);
+
+	out_xform_1 = xform[0];
+	out_xform_2 = xform[1];
+	out_xform_3 = xform[2];
+
+
+}
+
+[fragment]
+
+//any code here is never executed, stuff is filled just so it works
+
+FRAGMENT_SHADER_GLOBALS
+
+#if defined(USE_MATERIAL)
+
+layout(std140) uniform UniformData {
+
+MATERIAL_UNIFORMS
+
+};
+
+#endif
+
+void main() {
+
+	{
+		FRAGMENT_SHADER_CODE
+	}
+}