29 lines
651 B
GLSL
29 lines
651 B
GLSL
#version 100
|
|
|
|
precision mediump float;
|
|
|
|
// Input vertex attributes (from vertex shader)
|
|
varying vec2 fragTexCoord;
|
|
|
|
// Input uniform values
|
|
uniform sampler2D depthTexture;
|
|
uniform bool flipY;
|
|
|
|
float nearPlane = 0.1;
|
|
float farPlane = 100.0;
|
|
|
|
void main()
|
|
{
|
|
// Handle potential Y-flipping
|
|
vec2 texCoord = fragTexCoord;
|
|
if (flipY) texCoord.y = 1.0 - texCoord.y;
|
|
|
|
// Sample depth texture
|
|
float depth = texture2D(depthTexture, texCoord).r;
|
|
|
|
// Linearize depth
|
|
float linearDepth = (2.0*nearPlane)/(farPlane + nearPlane - depth*(farPlane - nearPlane));
|
|
|
|
// Output final color
|
|
gl_FragColor = vec4(vec3(linearDepth), 1.0);
|
|
}
|