diff options
Diffstat (limited to 'source/blender/draw/modes/shaders/object_particle_prim_vert.glsl')
-rw-r--r-- | source/blender/draw/modes/shaders/object_particle_prim_vert.glsl | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/source/blender/draw/modes/shaders/object_particle_prim_vert.glsl b/source/blender/draw/modes/shaders/object_particle_prim_vert.glsl new file mode 100644 index 00000000000..a950a9b86ba --- /dev/null +++ b/source/blender/draw/modes/shaders/object_particle_prim_vert.glsl @@ -0,0 +1,54 @@ + +uniform mat4 ModelViewProjectionMatrix; +uniform mat4 ViewProjectionMatrix; +uniform mat4 ModelViewMatrix; +uniform mat4 ProjectionMatrix; +uniform int screen_space; +uniform float draw_size; +uniform vec3 color; +uniform sampler1D ramp; + +in vec3 pos; +in vec4 rot; +in float val; +in vec3 inst_pos; +in int axis; + +flat out vec4 finalColor; + +vec3 rotate(vec3 vec, vec4 quat) +{ + /* The quaternion representation here stores the w component in the first index */ + return vec + 2.0 * cross(quat.yzw, cross(quat.yzw, vec) + quat.x * vec); +} + +void main() +{ + if (screen_space == 1) { + gl_Position = ModelViewMatrix * vec4(pos, 1.0) + vec4(inst_pos * draw_size, 0.0); + gl_Position = ProjectionMatrix * gl_Position; + } + else { + float size = draw_size; + + if (axis > -1) { + size *= 2; + } + + gl_Position = ModelViewProjectionMatrix * vec4(pos + rotate(inst_pos * size, rot), 1.0); + } + +#ifdef USE_AXIS + finalColor.rgb = vec3(0.0); + finalColor[axis] = 1.0; +#else + if (val < 0.0) { + finalColor.rgb = color; + } + else { + finalColor.rgb = texture(ramp, val).rgb; + } +#endif + + finalColor.a = 1.0; +} |