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80 lines
3.1 KiB
Plaintext
80 lines
3.1 KiB
Plaintext
/* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of NVIDIA CORPORATION nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// This example demonstrates how to use the CUDA Direct3D bindings with the
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// runtime API.
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// Device code.
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#ifndef _SIMPLED3D_KERNEL_CU_
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#define _SIMPLED3D_KERNEL_CU_
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// includes, C string library
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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///////////////////////////////////////////////////////////////////////////////
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//! Simple kernel to modify vertex positions in sine wave pattern
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//! @param pos pos in global memory
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///////////////////////////////////////////////////////////////////////////////
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__global__ void kernel(float4 *pos, unsigned int width, unsigned int height,
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float time) {
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unsigned int x = blockIdx.x * blockDim.x + threadIdx.x;
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unsigned int y = blockIdx.y * blockDim.y + threadIdx.y;
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// calculate uv coordinates
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float u = x / (float)width;
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float v = y / (float)height;
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u = u * 2.0f - 1.0f;
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v = v * 2.0f - 1.0f;
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// calculate simple sine wave pattern
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float freq = 4.0f;
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float w = sinf(u * freq + time) * cosf(v * freq + time) * 0.5f;
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// write output vertex
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pos[y * width + x] = make_float4(u, w, v, __int_as_float(0xff00ff00));
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}
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extern "C" void simpleD3DKernel(float4 *pos, unsigned int width,
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unsigned int height, float time) {
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cudaError_t error = cudaSuccess;
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dim3 block(8, 8, 1);
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dim3 grid(width / block.x, height / block.y, 1);
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kernel<<<grid, block>>>(pos, width, height, time);
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error = cudaGetLastError();
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if (error != cudaSuccess) {
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printf("kernel() failed to launch error = %d\n", error);
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}
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}
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#endif // #ifndef _SIMPLED3D_KERNEL_CU_
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