62 lines
1.8 KiB
Metal
62 lines
1.8 KiB
Metal
//
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// Shaders.metal
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// Terrain2
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//
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// Created by Eryn Wells on 11/3/18.
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// Copyright © 2018 Eryn Wells. All rights reserved.
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//
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// File for Metal kernel and shader functions
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#include <metal_stdlib>
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#include <simd/simd.h>
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// Including header shared between this Metal shader code and Swift/C code executing Metal API commands
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#import "ShaderTypes.h"
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using namespace metal;
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typedef struct
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{
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float3 position [[attribute(VertexAttributePosition)]];
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float3 normal [[attribute(VertexAttributeNormal)]];
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float2 texCoord [[attribute(VertexAttributeTexcoord)]];
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} Vertex;
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typedef struct
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{
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float4 position [[position]];
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float3 normal;
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float2 texCoord;
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} ColorInOut;
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vertex ColorInOut vertexShader(Vertex in [[stage_in]],
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texture2d<float> heights [[texture(0)]],
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constant Uniforms & uniforms [[buffer(BufferIndexUniforms)]])
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{
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// constexpr sampler s(coord::normalized, address::clamp_to_zero, filter::linear);
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ColorInOut out;
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// float4 height = heights.sample(s, in.texCoord);
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// Replace the y coordinate with the height we read from the texture.
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out.position = uniforms.projectionMatrix * uniforms.modelViewMatrix * float4(in.position, 1.0);
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out.normal = in.normal;
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out.texCoord = in.texCoord;
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return out;
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}
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fragment float4 fragmentShader(ColorInOut in [[stage_in]],
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constant Uniforms & uniforms [[ buffer(BufferIndexUniforms) ]],
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texture2d<half> colorMap [[ texture(TextureIndexColor) ]])
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{
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constexpr sampler colorSampler(mip_filter::linear,
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mag_filter::linear,
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min_filter::linear);
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half4 colorSample = colorMap.sample(colorSampler, in.texCoord.xy);
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return float4(1.0);
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}
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