urho3d/Bin/CoreData/Shaders/GLSL/GreyScale.glsl

#include "Uniforms.glsl"
#include "Samplers.glsl"
#include "Transform.glsl"
#include "ScreenPos.glsl"
#include "Lighting.glsl"

varying vec2 vScreenPos;

void VS()
{
    mat4 modelMatrix = iModelMatrix;
    vec3 worldPos = GetWorldPos(modelMatrix);
    gl_Position = GetClipPos(worldPos);
    vScreenPos = GetScreenPosPreDiv(gl_Position);
}

void PS()
{
    vec3 rgb = texture2D(sDiffMap, vScreenPos).rgb;
    float intensity = GetIntensity(rgb);
    gl_FragColor = vec4(intensity, intensity, intensity, 1.0);
}