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56 lines
1.8 KiB
Plaintext
Executable File
56 lines
1.8 KiB
Plaintext
Executable File
/*
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* Copyright 1993-2018 NVIDIA Corporation. All rights reserved.
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*
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* Please refer to the NVIDIA end user license agreement (EULA) associated
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* with this source code for terms and conditions that govern your use of
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* this software. Any use, reproduction, disclosure, or distribution of
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* this software and related documentation outside the terms of the EULA
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* is strictly prohibited.
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*
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*/
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#include <stdio.h>
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#include "ShaderStructs.h"
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#include "helper_cuda.h"
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__global__ void sinewave_gen_kernel(Vertex *vertices, unsigned int width, unsigned int height, float time)
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{
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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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if (y < height && x < width)
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{
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// write output vertex
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vertices[y*width+x].position.x = u;
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vertices[y*width+x].position.y = w;
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vertices[y*width+x].position.z = v;
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//vertices[y*width+x].position[3] = 1.0f;
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vertices[y*width+x].color.x = 1.0f;
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vertices[y*width+x].color.y = 0.0f;
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vertices[y*width+x].color.z = 0.0f;
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vertices[y*width + x].color.w = 0.0f;
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}
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}
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// The host CPU Sinewave thread spawner
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void RunSineWaveKernel(size_t mesh_width, size_t mesh_height, Vertex *cudaDevVertptr, cudaStream_t streamToRun, float AnimTime)
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{
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dim3 block(16, 16, 1);
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dim3 grid(mesh_width / 16, mesh_height / 16, 1);
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Vertex *vertices = (Vertex*)cudaDevVertptr;
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sinewave_gen_kernel<<< grid, block, 0, streamToRun >>>(vertices, mesh_width, mesh_height, AnimTime);
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getLastCudaError("sinewave_gen_kernel execution failed.\n");
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}
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