Marmoset Toolbag 4: Albedo Transition

transition1.frag

#include "../state.frag"
#include "../other/customExtras.sh"

#define MARGIN 0.05
#define RANGE 1.05

uniform float uStartTime;       // name "Start time (in seconds)"  min 0  max 60   default 0
uniform float uDurationTime;    // name "Duration (in seconds)"  min 0  max 60  default 10
USE_TEXTURE2D(tTransitionMap);  // name "Transition"
USE_TEXTURE2D(tAlbedoMap2);     // name "Albedo"

float getLerpFactor(in FragmentState s) {
	float blendFraction = textureMaterial(tTransitionMap, s.vertexTexCoord).r;
	float timeFraction = max(0, (uCustomAnimationTime - uStartTime)) / uDurationTime;
	float minValue = (timeFraction * RANGE) - MARGIN;
	return clamp((blendFraction - minValue) / MARGIN, 0.0, 1.0);
}

void CustomAlbedo(inout FragmentState s) {
	vec4 color1 = textureMaterial(tAlbedoMap, s.vertexTexCoord);
	color1 = uAlbedoMapGrayscale ? color1.rrra : color1;
	color1.xyz *= uAlbedoMapColor;

	vec4 color2 = textureMaterial(tAlbedoMap2, s.vertexTexCoord);
	color2 = uAlbedoMapGrayscale ? color2.rrra : color2;
	color2.xyz *= uAlbedoMapColor;

	vec4 result = lerp(color2, color1, getLerpFactor(s));
	s.albedo = result;
	s.baseColor = result.xyz;
}

#ifdef Albedo
	#undef Albedo
#endif
#define Albedo CustomAlbedo