virtualx-engine/drivers/gles2/shaders/canvas_shadow.glsl

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[vertex]
#ifdef USE_GLES_OVER_GL
#define mediump
#define highp
#else
precision mediump float;
precision mediump int;
#endif
uniform highp mat4 projection_matrix;
uniform highp mat4 light_matrix;
uniform highp mat4 world_matrix;
attribute highp vec3 vertex; // attrib:0
#ifndef USE_DEPTH_SHADOWS
varying vec4 position_interp;
#endif
void main() {
gl_Position = projection_matrix * (light_matrix * (world_matrix * vec4(vertex,1.0)));
#ifndef USE_DEPTH_SHADOWS
position_interp = gl_Position;
#endif
}
[fragment]
#ifdef USE_GLES_OVER_GL
#define mediump
#define highp
#else
precision mediump float;
precision mediump int;
#endif
#ifndef USE_DEPTH_SHADOWS
varying vec4 position_interp;
#endif
void main() {
#ifdef USE_DEPTH_SHADOWS
#else
highp float depth = ((position_interp.z / position_interp.w) + 1.0) * 0.5 + 0.0;//bias;
highp vec4 comp = fract(depth * vec4(256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0));
comp -= comp.xxyz * vec4(0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0);
gl_FragColor = comp;
#endif
}