export default /* glsl */` #define DISTANCE uniform vec3 referencePosition; uniform float nearDistance; uniform float farDistance; varying vec3 vWorldPosition; #include #include #include #include #include #include void main () { #include vec4 diffuseColor = vec4( 1.0 ); #include #include #include float dist = length( vWorldPosition - referencePosition ); dist = ( dist - nearDistance ) / ( farDistance - nearDistance ); dist = saturate( dist ); // clamp to [ 0, 1 ] gl_FragColor = packDepthToRGBA( dist ); } `;