Forge

cpu/plotting.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>
const unsigned DIMX = 1000;
const unsigned DIMY = 800;
const float FRANGE_START = 0.f;
const float FRANGE_END = 2.f * 3.1415926f;
using namespace std;
void map_range_to_vec_vbo(float range_start, float range_end, float dx,
std::vector<float> &vec,
float (*map) (float))
{
if(range_start > range_end && dx > 0) return;
for(float i=range_start; i < range_end; i+=dx){
vec.push_back(i);
vec.push_back((*map)(i));
}
}
int main(void)
{
std::vector<float> sinData;
std::vector<float> cosData;
std::vector<float> tanData;
std::vector<float> logData;
map_range_to_vec_vbo(FRANGE_START, FRANGE_END, 0.1f, sinData, &sinf);
map_range_to_vec_vbo(FRANGE_START, FRANGE_END, 0.1f, cosData, &cosf);
map_range_to_vec_vbo(FRANGE_START, FRANGE_END, 0.1f, tanData, &tanf);
map_range_to_vec_vbo(FRANGE_START, FRANGE_END, 0.1f, logData, &log10f);
/*
* 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, "Plotting 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 plt0 = chart.plot(sinData.size()/2, forge::f32); //create a default plot
forge::Plot plt1 = chart.plot(cosData.size()/2, forge::f32, FG_PLOT_LINE, FG_MARKER_NONE); //or specify a specific plot type
forge::Plot plt2 = chart.plot(tanData.size()/2, forge::f32, FG_PLOT_LINE, FG_MARKER_TRIANGLE); //last parameter specifies marker shape
forge::Plot plt3 = chart.plot(logData.size()/2, forge::f32, FG_PLOT_SCATTER, FG_MARKER_CROSS);
/*
* Set plot colors
*/
plt0.setColor(FG_RED);
plt1.setColor(FG_BLUE);
plt2.setColor(FG_YELLOW); //use a forge predefined color
plt3.setColor((forge::Color) 0x257973FF); //or any hex-valued color
/*
* Set plot legends
*/
plt0.setLegend("Sine");
plt1.setLegend("Cosine");
plt2.setLegend("Tangent");
plt3.setLegend("Log base 10");
GfxHandle* handles[4];
createGLBuffer(&handles[0], plt0.vertices(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[1], plt1.vertices(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[2], plt2.vertices(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[3], plt3.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(handles[0], (ComputeResourceHandle)sinData.data(), plt0.verticesSize());
copyToGLBuffer(handles[1], (ComputeResourceHandle)cosData.data(), plt1.verticesSize());
copyToGLBuffer(handles[2], (ComputeResourceHandle)tanData.data(), plt2.verticesSize());
copyToGLBuffer(handles[3], (ComputeResourceHandle)logData.data(), plt3.verticesSize());
do {
wnd.draw(chart);
} while(!wnd.close());
releaseGLBuffer(handles[0]);
releaseGLBuffer(handles[1]);
releaseGLBuffer(handles[2]);
releaseGLBuffer(handles[3]);
return 0;
}