@animech-public/playcanvas/build/playcanvas.prf/src/scene/shader-lib/chunks/common/frag/screenDepth.js

PlayCanvas WebGL game engine

var screenDepthPS = `
uniform highp sampler2D uSceneDepthMap;
#ifndef SCREENSIZE
#define SCREENSIZE
uniform vec4 uScreenSize;
#endif
#ifndef VIEWMATRIX
#define VIEWMATRIX
uniform mat4 matrix_view;
#endif
#ifndef LINEARIZE_DEPTH
#ifndef CAMERAPLANES
#define CAMERAPLANES
uniform vec4 camera_params;
#endif
#define LINEARIZE_DEPTH
#ifdef GL2
float linearizeDepth(float z) {
	if (camera_params.w == 0.0)
		return (camera_params.z * camera_params.y) / (camera_params.y + z * (camera_params.z - camera_params.y));
	else
		return camera_params.z + z * (camera_params.y - camera_params.z);
}
#else
#ifndef UNPACKFLOAT
#define UNPACKFLOAT
float unpackFloat(vec4 rgbaDepth) {
	const vec4 bitShift = vec4(1.0 / (256.0 * 256.0 * 256.0), 1.0 / (256.0 * 256.0), 1.0 / 256.0, 1.0);
	return dot(rgbaDepth, bitShift);
}
#endif
#endif
#endif
float getLinearScreenDepth(vec2 uv) {
	#ifdef GL2
		return linearizeDepth(texture2D(uSceneDepthMap, uv).r);
	#else
		return unpackFloat(texture2D(uSceneDepthMap, uv)) * camera_params.y;
	#endif
}
#ifndef VERTEXSHADER
float getLinearScreenDepth() {
	vec2 uv = gl_FragCoord.xy * uScreenSize.zw;
	return getLinearScreenDepth(uv);
}
#endif
float getLinearDepth(vec3 pos) {
	return -(matrix_view * vec4(pos, 1.0)).z;
}
`;

export { screenDepthPS as default };