Upload files to "semag/mind/assets/com/badlogic/gdx/graphics/g3d/particles"

semag/mind/assets/com/badlogic/gdx/graphics/g3d/particles/particles.fragment.glsl

@@ -0,0 +1,39 @@
+#ifdef GL_ES 
+#define LOWP lowp
+#define MED mediump
+#define HIGH highp
+precision mediump float;
+#else
+#define MED
+#define LOWP
+#define HIGH
+#endif
+
+
+#ifdef billboard
+//Billboard particles
+varying vec4 v_color;
+varying MED vec2 v_texCoords0;
+uniform sampler2D u_diffuseTexture;
+
+void main() {
+	gl_FragColor = texture2D(u_diffuseTexture, v_texCoords0) * v_color;
+}
+#else
+
+//Point particles
+varying vec4 v_color;
+varying vec4 v_rotation;
+varying MED vec4 v_region;
+varying vec2 v_uvRegionCenter;
+
+uniform sampler2D u_diffuseTexture;
+uniform vec2 u_regionSize;
+
+void main() {
+	vec2 uv = v_region.xy + gl_PointCoord*v_region.zw - v_uvRegionCenter;
+	vec2 texCoord = mat2(v_rotation.x, v_rotation.y, v_rotation.z, v_rotation.w) * uv  +v_uvRegionCenter;
+	gl_FragColor = texture2D(u_diffuseTexture, texCoord)* v_color;
+}
+
+#endif

semag/mind/assets/com/badlogic/gdx/graphics/g3d/particles/particles.vertex.glsl

@@ -0,0 +1,110 @@
+#ifdef GL_ES 
+#define LOWP lowp
+#define MED mediump
+#define HIGH highp
+precision mediump float;
+#else
+#define MED
+#define LOWP
+#define HIGH
+#endif
+
+#ifdef billboard
+//Billboard particles
+//In
+attribute vec3 a_position;
+attribute vec2 a_texCoord0;
+attribute vec4 a_sizeAndRotation;
+attribute vec4 a_color;
+
+//out
+varying MED vec2 v_texCoords0;
+varying vec4 v_color;
+
+//Camera
+uniform mat4 u_projViewTrans;
+
+//Billboard to screen
+#ifdef screenFacing
+uniform vec3 u_cameraInvDirection;
+uniform vec3 u_cameraRight;
+uniform vec3 u_cameraUp;
+#endif
+#ifdef viewPointFacing
+uniform vec3 u_cameraPosition;
+uniform vec3 u_cameraUp;
+#endif
+#ifdef paticleDirectionFacing
+uniform vec3 u_cameraPosition;
+attribute vec3 a_direction;
+#endif
+
+void main() {
+
+#ifdef screenFacing
+	vec3 right = u_cameraRight;
+	vec3 up = u_cameraUp;
+	vec3 look = u_cameraInvDirection;
+#endif
+#ifdef viewPointFacing
+	vec3 look = normalize(u_cameraPosition - a_position);
+	vec3 right = normalize(cross(u_cameraUp, look));
+	vec3 up = normalize(cross(look, right));
+#endif
+#ifdef paticleDirectionFacing
+	vec3 up = a_direction;
+	vec3 look = normalize(u_cameraPosition - a_position);
+	vec3 right = normalize(cross(up, look));
+	look = normalize(cross(right, up));
+#endif
+
+	//Rotate around look
+	vec3 axis = look;
+	float c = a_sizeAndRotation.z;
+    float s = a_sizeAndRotation.w;
+    float oc = 1.0 - c;
+    
+    mat3 rot = mat3(oc * axis.x * axis.x + c, oc * axis.x * axis.y - axis.z * s,  oc * axis.z * axis.x + axis.y * s,
+                oc * axis.x * axis.y + axis.z * s,  oc * axis.y * axis.y + c,           oc * axis.y * axis.z - axis.x * s,
+                oc * axis.z * axis.x - axis.y * s,  oc * axis.y * axis.z + axis.x * s,  oc * axis.z * axis.z + c);	
+	vec3 offset = rot*(right*a_sizeAndRotation.x + up*a_sizeAndRotation.y );
+
+	gl_Position = u_projViewTrans * vec4(a_position + offset, 1.0);
+	v_texCoords0 = a_texCoord0;
+	v_color = a_color;
+}
+#else
+//Point particles
+attribute vec3 a_position;
+attribute vec3 a_sizeAndRotation;
+attribute vec4 a_color;
+attribute vec4 a_region;
+
+//out
+varying vec4 v_color;
+varying vec4 v_rotation;
+varying MED vec4 v_region;
+varying vec2 v_uvRegionCenter;
+
+//Camera
+uniform mat4 u_projTrans;
+//should be modelView but particles are already in world coordinates
+uniform mat4 u_viewTrans;
+uniform float u_screenWidth;
+uniform vec2 u_regionSize;
+
+void main(){
+
+	float halfSize = 0.5*a_sizeAndRotation.x;
+	vec4 eyePos = u_viewTrans * vec4(a_position, 1); 
+	vec4 projCorner = u_projTrans * vec4(halfSize, halfSize, eyePos.z, eyePos.w);
+	gl_PointSize = u_screenWidth * projCorner.x / projCorner.w;
+	gl_Position = u_projTrans * eyePos;
+	v_rotation = vec4(a_sizeAndRotation.y, a_sizeAndRotation.z, -a_sizeAndRotation.z, a_sizeAndRotation.y);
+	v_color = a_color;
+	v_region.xy = a_region.xy;
+	v_region.zw = a_region.zw -a_region.xy;	
+	v_uvRegionCenter = a_region.xy +v_region.zw*0.5;
+}
+
+#endif