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Four color gradients! Standard APIs! Wowwwww

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This commit is contained in:
Eryn Wells 2018-10-09 17:44:07 -07:00
parent 141eee69ee
commit 2fa9b838f7
5 changed files with 35 additions and 34 deletions
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33
MetaballsKit/Shaders.metal
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@ -27,14 +27,10 @@ typedef struct {
typedef enum {
/// Single flat color
SingleColor = 1,
/// Two color horizontal gradient
Gradient2Horizontal = 2,
/// Two color vertical gradient
Gradient2Vertical = 3,
/// Four color gradient from corners
Gradient4Corners = 4,
/// Four color gradient from middle of sides
Gradient4Sides = 5,
/// Two color gradient
Gradient2 = 2,
/// Four color gradient
Gradient4 = 4,
} ColorStyle;
typedef struct {
@ -88,19 +84,26 @@ sampleToColorShader(RasterizerData in [[stage_in]],
case SingleColor:
out = singleColor(sample, target, feather, parameters.colors[0]);
break;
case Gradient2Horizontal: {
const float3 transformedColor = (parameters.colorTransform * float3(in.position.xy, 1.0));
case Gradient2: {
const float3 transformedColor = parameters.colorTransform * float3(in.position.xy, 1.0);
const float blend = transformedColor.x / parameters.size[0];
out = gradient2(sample, target, feather, blend, parameters.colors[0], parameters.colors[1]);
const float4 color = mix(parameters.colors[0], parameters.colors[1], blend);
out = singleColor(sample, target, feather, color);
break;
}
case Gradient2Vertical: {
const float blend = in.position.y / parameters.size[1];
out = gradient2(sample, target, feather, blend, parameters.colors[0], parameters.colors[1]);
case Gradient4: {
const float3 transformedColorCoords = parameters.colorTransform * float3(in.position.xy, 1.0);
const float2 blend = float2(transformedColorCoords.x / parameters.size[0],
transformedColorCoords.y / parameters.size[1]);
const float4 color = mix(mix(parameters.colors[0], parameters.colors[2], blend.y),
mix(parameters.colors[1], parameters.colors[3], blend.y),
blend.x);
out = singleColor(sample, target, feather, color);
break;
}
}
return out;
}
@ -147,7 +150,7 @@ gradient2(float sample,
float4 fromColor,
float4 toColor)
{
float4 blendedColor = averageTwoColors(normalizedBlend, fromColor, toColor);
float4 blendedColor = mix(fromColor, toColor, normalizedBlend);
float4 out = singleColor(sample, target, feather, blendedColor);
return out;
}