playcanvas/build/playcanvas/src/scene/shader-lib/glsl/chunks/common/frag/pick.js

Open-source WebGL/WebGPU 3D engine for the web

var pick_default = `
vec4 encodePickOutput(uint id) {
	const vec4 inv = vec4(1.0 / 255.0);
	const uvec4 shifts = uvec4(16, 8, 0, 24);
	uvec4 col = (uvec4(id) >> shifts) & uvec4(0xff);
	return vec4(col) * inv;
}
#ifndef PICK_CUSTOM_ID
	uniform uint meshInstanceId;
	vec4 getPickOutput() {
		return encodePickOutput(meshInstanceId);
	}
#endif
#ifdef DEPTH_PICK_PASS
	#include "floatAsUintPS"
	#ifndef CAMERAPLANES
		#define CAMERAPLANES
		uniform vec4 camera_params;
	#endif
	vec4 getPickDepth() {
		float linearDepth;
		if (camera_params.w > 0.5) {
			linearDepth = gl_FragCoord.z;
		} else {
			float viewDist = 1.0 / gl_FragCoord.w;
			linearDepth = (viewDist - camera_params.z) / (camera_params.y - camera_params.z);
		}
		return float2uint(linearDepth);
	}
#endif
`;
export {
	pick_default as default
};