初始化内容

third/JoltPhysics/Assets/Shaders/MTL/UIShader.metal

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+#include <metal_stdlib>
+
+using namespace metal;
+
+#include "VertexConstants.h"
+
+constexpr sampler uiTextureSampler(mag_filter::linear, min_filter::linear);
+
+struct UIVertex
+{
+	float3		vPos [[attribute(0)]];
+	float2		vTex [[attribute(1)]];
+	uchar4		vCol [[attribute(2)]];
+};
+
+struct UIOut
+{
+    float4 		oPosition [[position]];
+    float2 		oTex;
+    float4 		oColor;
+};
+
+vertex UIOut UIVertexShader(UIVertex vert [[stage_in]], constant VertexShaderConstantBuffer *constants [[buffer(2)]])
+{
+    UIOut out;
+    out.oPosition = constants->Projection * constants->View * float4(vert.vPos, 1.0);
+    out.oTex = vert.vTex;
+    out.oColor = float4(vert.vCol) / 255.0;
+    return out;
+}
+
+fragment float4 UIPixelShader(UIOut in [[stage_in]], texture2d<float> uiTexture [[texture(0)]])
+{
+	const float4 sample = uiTexture.sample(uiTextureSampler, in.oTex);
+    return sample * in.oColor;
+}
+
+fragment float4 UIPixelShaderUntextured(UIOut in [[stage_in]])
+{
+    return in.oColor;
+}