Forge: cpu/surface.cpp

Forge

cpu/surface.cpp
/*******************************************************
* 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>
#define USE_FORGE_CPU_COPY_HELPERS
#include <ComputeCopy.h>
#include <complex>
#include <cmath>
#include <vector>
#include <iostream>
using namespace std;
static const float XMIN = -32.0f;
static const float XMAX = 32.0f;
static const float YMIN = -32.0f;
static const float YMAX = 32.0f;
const float DX = 0.25;
const size_t XSIZE = (XMAX-XMIN)/DX;
const size_t YSIZE = (YMAX-YMIN)/DX;
void genSurface(float dx, std::vector<float> &vec )
{
vec.clear();
for(float x=XMIN; x < XMAX; x+=dx) {
for(float y=YMIN; y < YMAX; y+=dx) {
vec.push_back(x);
vec.push_back(y);
float z = sqrt(x*x+y*y) + 2.2204e-16;
vec.push_back(sin(z)/z);
}
}
}
int main(void)
{
/*
* 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(1024, 768, "3d Surface Demo");
wnd. makeCurrent();
forge::Chart chart(FG_CHART_3D);
chart. setAxesLimits(XMIN-2.0f, XMAX+2.0f, YMIN-2.0f, YMAX+2.0f, -0.5f, 1.f);
chart. setAxesTitles("x-axis", "y-axis", "z-axis");
forge::Surface surf = chart. surface(XSIZE, YSIZE, forge::f32);
surf. setColor(FG_YELLOW);
//generate a surface
std::vector<float> function;
genSurface(DX, function);
GfxHandle* handle;
createGLBuffer(&handle, surf. vertices(), FORGE_VERTEX_BUFFER);
/* copy your data into the pixel 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
*/
copyToGLBuffer(handle, (ComputeResourceHandle)function.data(), surf. verticesSize());
do {
wnd. draw(chart);
} while(!wnd. close());
releaseGLBuffer(handle);
return 0;
}