mirror of
https://github.com/NVIDIA/cuda-samples.git
synced 2024-11-24 21:59:18 +08:00
56 lines
1.8 KiB
Plaintext
Executable File
56 lines
1.8 KiB
Plaintext
Executable File
/*
|
|
* Copyright 1993-2018 NVIDIA Corporation. All rights reserved.
|
|
*
|
|
* Please refer to the NVIDIA end user license agreement (EULA) associated
|
|
* with this source code for terms and conditions that govern your use of
|
|
* this software. Any use, reproduction, disclosure, or distribution of
|
|
* this software and related documentation outside the terms of the EULA
|
|
* is strictly prohibited.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "ShaderStructs.h"
|
|
#include "helper_cuda.h"
|
|
|
|
__global__ void sinewave_gen_kernel(Vertex *vertices, unsigned int width, unsigned int height, float time)
|
|
{
|
|
unsigned int x = blockIdx.x*blockDim.x + threadIdx.x;
|
|
unsigned int y = blockIdx.y*blockDim.y + threadIdx.y;
|
|
|
|
// calculate uv coordinates
|
|
float u = x / (float) width;
|
|
float v = y / (float) height;
|
|
u = u*2.0f - 1.0f;
|
|
v = v*2.0f - 1.0f;
|
|
|
|
// calculate simple sine wave pattern
|
|
float freq = 4.0f;
|
|
float w = sinf(u*freq + time) * cosf(v*freq + time) * 0.5f;
|
|
|
|
if (y < height && x < width)
|
|
{
|
|
// write output vertex
|
|
vertices[y*width+x].position.x = u;
|
|
vertices[y*width+x].position.y = w;
|
|
vertices[y*width+x].position.z = v;
|
|
//vertices[y*width+x].position[3] = 1.0f;
|
|
vertices[y*width+x].color.x = 1.0f;
|
|
vertices[y*width+x].color.y = 0.0f;
|
|
vertices[y*width+x].color.z = 0.0f;
|
|
vertices[y*width + x].color.w = 0.0f;
|
|
}
|
|
}
|
|
|
|
// The host CPU Sinewave thread spawner
|
|
void RunSineWaveKernel(size_t mesh_width, size_t mesh_height, Vertex *cudaDevVertptr, cudaStream_t streamToRun, float AnimTime)
|
|
{
|
|
dim3 block(16, 16, 1);
|
|
dim3 grid(mesh_width / 16, mesh_height / 16, 1);
|
|
Vertex *vertices = (Vertex*)cudaDevVertptr;
|
|
sinewave_gen_kernel<<< grid, block, 0, streamToRun >>>(vertices, mesh_width, mesh_height, AnimTime);
|
|
|
|
getLastCudaError("sinewave_gen_kernel execution failed.\n");
|
|
}
|
|
|