Forge

cuda/bubblechart.cu
/*******************************************************
* Copyright (c) 2015-2019, ArrayFire
* All rights reserved.
*
* This file is distributed under 3-clause BSD license.
* The complete license agreement can be obtained at:
* http://arrayfire.com/licenses/BSD-3-Clause
********************************************************/
#include <forge.h>
#include <cuda_runtime.h>
#include <curand.h>
#include <curand_kernel.h>
#define USE_FORGE_CUDA_COPY_HELPERS
#include <ComputeCopy.h>
#include <cstdio>
#include <iostream>
const unsigned DIMX = 1000;
const unsigned DIMY = 800;
static const float DX = 0.1;
static const float FRANGE_START = 0.f;
static const float FRANGE_END = 2 * 3.141592f;
static const size_t DATA_SIZE = (FRANGE_END - FRANGE_START) / DX;
curandState_t* state;
void kernel(float* dev_out, int functionCode,
float* colors, float* alphas, float* radii);
inline int divup(int a, int b)
{
return (a+b-1)/b;
}
__global__
void setupRandomKernel(curandState *states, unsigned long long seed)
{
unsigned tid = blockDim.x * blockIdx.x + threadIdx.x;
curand_init(seed, tid, 0, &states[tid]);
}
int main(void)
{
FORGE_CUDA_CHECK(cudaMalloc((void **)&state, DATA_SIZE*sizeof(curandState_t)));
setupRandomKernel <<< divup(DATA_SIZE,32), 32 >>> (state, 314567);
float *cos_out;
float *tan_out;
float *colors_out;
float *alphas_out;
float *radii_out;
FORGE_CUDA_CHECK(cudaMalloc((void**)&cos_out, sizeof(float) * DATA_SIZE * 2));
FORGE_CUDA_CHECK(cudaMalloc((void**)&tan_out, sizeof(float) * DATA_SIZE * 2));
FORGE_CUDA_CHECK(cudaMalloc((void**)&colors_out, sizeof(float) * DATA_SIZE * 3));
FORGE_CUDA_CHECK(cudaMalloc((void**)&alphas_out, sizeof(float) * DATA_SIZE));
FORGE_CUDA_CHECK(cudaMalloc((void**)&radii_out, sizeof(float) * DATA_SIZE));
/*
* First Forge call should be a window creation call
* so that necessary OpenGL context is created for any
* other forge::* object to be created successfully
*/
forge::Window wnd(DIMX, DIMY, "Bubble chart with Transparency Demo");
wnd.makeCurrent();
forge::Chart chart(FG_CHART_2D);
chart.setAxesLimits(FRANGE_START, FRANGE_END, -1.0f, 1.0f);
/* Create several plot objects which creates the necessary
* vertex buffer objects to hold the different plot types
*/
forge::Plot plt1 = chart.plot(DATA_SIZE, forge::f32, FG_PLOT_LINE, FG_MARKER_TRIANGLE);
forge::Plot plt2 = chart.plot(DATA_SIZE, forge::f32, FG_PLOT_LINE, FG_MARKER_CIRCLE);
/* Set plot colors */
plt1.setColor(FG_RED);
plt2.setColor(FG_GREEN); //use a forge predefined color
/* Set plot legends */
plt1.setLegend("Cosine");
plt2.setLegend("Tangent");
/* set plot global marker size */
plt1.setMarkerSize(20);
/* copy your data into the opengl buffer object exposed by
* forge::Plot class and then proceed to rendering.
* To help the users with copying the data from compute
* memory to display memory, Forge provides copy headers
* along with the library to help with this task
*/
GfxHandle* handles[5];
// create GL-CUDA interop buffers
createGLBuffer(&handles[0], plt1.vertices(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[1], plt2.vertices(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[2], plt2.colors(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[3], plt2.alphas(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[4], plt2.radii(), FORGE_VERTEX_BUFFER);
kernel(cos_out, 0, NULL, NULL, NULL);
kernel(tan_out, 1, colors_out, alphas_out, radii_out);
// copy the data from compute buffer to graphics buffer
copyToGLBuffer(handles[0], (ComputeResourceHandle)cos_out, plt1.verticesSize());
copyToGLBuffer(handles[1], (ComputeResourceHandle)tan_out, plt2.verticesSize());
/* update color value for tan graph */
copyToGLBuffer(handles[2], (ComputeResourceHandle)colors_out, plt2.colorsSize());
/* update alpha values for tan graph */
copyToGLBuffer(handles[3], (ComputeResourceHandle)alphas_out, plt2.alphasSize());
/* update marker sizes for tan graph markers */
copyToGLBuffer(handles[4], (ComputeResourceHandle)radii_out, plt2.radiiSize());
do {
wnd.draw(chart);
} while(!wnd.close());
// destroy GL-CUDA Interop buffer
releaseGLBuffer(handles[0]);
releaseGLBuffer(handles[1]);
releaseGLBuffer(handles[2]);
releaseGLBuffer(handles[3]);
releaseGLBuffer(handles[4]);
// destroy CUDA handles
FORGE_CUDA_CHECK(cudaFree(cos_out));
FORGE_CUDA_CHECK(cudaFree(tan_out));
FORGE_CUDA_CHECK(cudaFree(colors_out));
FORGE_CUDA_CHECK(cudaFree(alphas_out));
FORGE_CUDA_CHECK(cudaFree(radii_out));
return 0;
}
__global__
void mapKernel(float* out, int functionCode, float frange_start, float dx)
{
int id = blockIdx.x * blockDim.x + threadIdx.x;
float x = frange_start + id*dx;
float y;
switch(functionCode) {
case 0: y = cos(x); break;
case 1: y = tan(x); break;
default: y = sin(x); break;
}
out[2*id+0] = x;
out[2*id+1] = y;
}
__global__
void colorsKernel(float* colors, curandState *states)
{
int id = blockIdx.x * blockDim.x + threadIdx.x;
colors[3*id+0] = curand_uniform(&states[id]);
colors[3*id+1] = curand_uniform(&states[id]);
colors[3*id+2] = curand_uniform(&states[id]);
}
__global__
void randKernel(float* out, curandState *states, float min, float scale)
{
int id = blockIdx.x * blockDim.x + threadIdx.x;
out[id] = curand_uniform(&states[id])*scale + min;
}
void kernel(float* dev_out, int functionCode,
float* colors, float* alphas, float* radii)
{
static const dim3 threads(32);
dim3 blocks(divup(DATA_SIZE, 32));
mapKernel<<< blocks, threads >>>(dev_out, functionCode, FRANGE_START, DX);
if (colors)
colorsKernel<<< blocks, threads >>>(colors, state);
if (alphas)
randKernel<<< blocks, threads >>>(alphas, state, 0, 1);
if (radii)
randKernel<<< blocks, threads >>>(radii, state, 20, 60);
}