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Add shaders for marching squares

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This commit is contained in:
Eryn Wells 2018-10-14 12:16:21 -07:00
parent 1699e3ae14
commit b2f19dffbf
4 changed files with 80 additions and 9 deletions
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10
Metaballs.xcodeproj/project.pbxproj
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@ -10,6 +10,9 @@
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@ -211,6 +216,8 @@
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@ -487,6 +496,7 @@
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C0FF7CB5216B002E0081B781 /* Metaballs.swift in Sources */, C0FF7CB5216B002E0081B781 /* Metaballs.swift in Sources */,
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C04CDEB72173ABD50018C4DA /* MarchingSquares.metal in Sources */,
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C0FF7CA8216AFD840081B781 /* ViewController.swift in Sources */, C0FF7CA8216AFD840081B781 /* ViewController.swift in Sources */,

45
MetaballsKit/MarchingSquares.metal Normal file
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@ -0,0 +1,45 @@
//
// MarchingSquares.metal
// Metaballs
//
// Created by Eryn Wells on 10/14/18.
// Copyright © 2018 Eryn Wells. All rights reserved.
//
#include <metal_stdlib>
#include "ShaderTypes.hh"
using namespace metal;
struct Rect {
float4x4 transform;
float4 color;
};
struct RasterizerData {
float4 position [[position]];
float4 color;
float2 textureCoordinate;
};
vertex RasterizerData
gridVertexShader(constant Vertex *vertexes [[buffer(0)]],
constant Rect *rects [[buffer(1)]],
constant RenderParameters &renderParameters [[buffer(2)]],
uint vid [[vertex_id]],
uint instid [[instance_id]])
{
Vertex v = vertexes[vid];
Rect rect = rects[instid];
RasterizerData out;
out.position = renderParameters.projection * rect.transform * float4(v.position.xy, 0, 1);
out.textureCoordinate = v.textureCoordinate;
return out;
}
fragment float4
gridFragmentShader(RasterizerData in [[stage_in]])
{
return in.color;
}

24
MetaballsKit/ShaderTypes.hh Normal file
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@ -0,0 +1,24 @@
//
// ShaderTypes.h
// Metaballs
//
// Created by Eryn Wells on 10/14/18.
// Copyright © 2018 Eryn Wells. All rights reserved.
//
#ifndef ShaderTypes_hh
#define ShaderTypes_hh
#include <metal_stdlib>
struct Vertex {
float2 position;
float2 textureCoordinate;
};
struct RenderParameters {
/// Projection matrix.
metal::float4x4 projection;
};
#endif /* ShaderTypes_hh */

10
MetaballsKit/Shaders.metal
View file

@ -7,13 +7,9 @@
// //
#include <metal_stdlib> #include <metal_stdlib>
#include "ShaderTypes.hh"
using namespace metal; using namespace metal;
struct Vertex {
float2 position;
float2 textureCoordinate;
};
// From HelloCompute sample code project. // From HelloCompute sample code project.
// Vertex shader outputs and per-fragmeht inputs. Includes clip-space position and vertex outputs interpolated by rasterizer and fed to each fragment genterated by clip-space primitives. // Vertex shader outputs and per-fragmeht inputs. Includes clip-space position and vertex outputs interpolated by rasterizer and fed to each fragment genterated by clip-space primitives.
struct RasterizerData { struct RasterizerData {
@ -43,10 +39,6 @@ struct Parameters {
float3x3 colorTransform; float3x3 colorTransform;
}; };
struct RenderParameters {
float4x4 projection;
};
typedef float3 Ball; typedef float3 Ball;
#pragma mark - Vertex #pragma mark - Vertex