79 lines
1.6 KiB
Plaintext
79 lines
1.6 KiB
Plaintext
p :: properties {
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input_tex : Texture2D;
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tex_sampler : Sampler;
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hour_of_day : float;
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}
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VS_Input :: struct {
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pos : float3 @position;
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uv : float2 @uv;
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}
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VS_Output :: struct {
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pos : float4 @outposition;
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uv : float2 @uv;
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}
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vertex main :: (input : VS_Input) -> VS_Output {
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output : VS_Output;
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output.pos = float4(input.pos, 1.0);
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output.uv = input.uv;
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return output;
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}
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apply_night :: (color : float4) -> float4 {
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result := color;
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result -= float4(0.3, 0.2, 0.0, 0.0);
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result *= 0.8;
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return result;
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}
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apply_twilight :: (color : float4) -> float4 {
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result := color;
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result += float4(0.2, -0.1, 0.1, 0.0);
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result *= 0.9;
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return result;
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}
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apply_morning :: (color : float4) -> float4 {
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return color * 1.3;
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}
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apply_dawn :: (color : float4) -> float4 {
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return color;
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}
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pixel main :: (input : VS_Output) -> float4 @outposition {
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sampled_color : float4 = sample(p.input_tex, p.tex_sampler, input.uv);
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t := 0.0;
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a := float4(0, 0, 0, 0);
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b := float4(0, 0, 0, 0);
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if p.hour_of_day > 16 {
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t = (p.hour_of_day - 16) / 6;
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a = apply_twilight(sampled_color);
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b = apply_night(sampled_color);
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} else if p.hour_of_day > 12 {
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t = (p.hour_of_day - 12) / 6;
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a = sampled_color;
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b = apply_twilight(sampled_color);
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} else if p.hour_of_day > 6 {
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t = (p.hour_of_day - 6) / 6;
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a = apply_morning(sampled_color);
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b = sampled_color;
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} else if p.hour_of_day >= 0 {
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t = p.hour_of_day / 6;
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a = apply_night(sampled_color);
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b = apply_morning(sampled_color);
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}
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return lerp(a, b, t);
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}
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