shaders.hlsl

//*********************************************************
//
// Copyright (c) Microsoft. All rights reserved.
// This code is licensed under the MIT License (MIT).
// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
//
//*********************************************************

// #DXR Extra: Perspective Camera
cbuffer CameraParams : register(b0)
{
    float4x4 view;
    float4x4 projection;
}

// #DXR Extra: Refitting (Rasterization)
struct InstanceProperties
{
    float4x4 objectToWorld;
};

StructuredBuffer<InstanceProperties> instanceProps : register(t0);

uint instanceIndex : register(b1);

struct PSInput
{
	float4 position : SV_POSITION;
	float4 color : COLOR;
};

PSInput VSMain(float4 position : POSITION, float4 color : COLOR)
{
	PSInput result;

	// #DXR Extra: Perspective Camera
    // #DXR Extra: Refitting (Rasterization)
    float4 pos;
    uint numStructs, stride;
    instanceProps.GetDimensions(numStructs, stride);
	if(instanceIndex >= numStructs)
    {
        pos = position;
    }
    else
    {
        pos = mul(instanceProps[instanceIndex].objectToWorld, position);
    }
    pos = mul(view, pos);
    pos = mul(projection, pos);
	
	result.position = pos;
	result.color = color;

	return result;
}

float4 PSMain(PSInput input) : SV_TARGET
{
	return input.color;
}