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#version 330
// Input vertex attributes (from vertex shader)
in vec2 fragTexCoord;
in vec4 fragColor;
// Input uniform values
uniform sampler2D texture0;
uniform vec4 colDiffuse;
// Output fragment color
out vec4 finalColor;
// NOTE: Add here your custom variables
void main()
{
// Texel color fetching from texture sampler
vec4 texelColor = texture(texture0, fragTexCoord)*colDiffuse*fragColor;
// Convert texel color to grayscale using NTSC conversion weights
float gray = dot(texelColor.rgb, vec3(0.299, 0.587, 0.114));
// Calculate final fragment color
finalColor = vec4(gray, gray, gray, texelColor.a);
}
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