| Es++ Sample: PyramidRotationOnIdleTime |

/******************************************************************************
*
* Copyright (c) 2017 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
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*
* PyramidRotationOnIdleTime.cpp
*
*****************************************************************************/
//
#include <es++/opengl/OpenGLApplication.h>
#include <es++/opengl/OpenGLMainView.h>
#include <es++/opengl/OpenGLView.h>
#include <es++/opengl/OpenGLGC.h>
#include <es++/opengl/OpenGLClientState.h>
using namespace Gtk;
namespace Es {
class MainView :public Es::OpenGLMainView {
private:
///////////////////////////////////////////////////////
//Inner classes start.
class SimpleView :public Es::OpenGLView {
private:
OpenGLGC gc;
float angle;
public:
SimpleView()
:OpenGLView()
,angle(2.0f)
{
}
virtual void display()
{
angle += 0.4f;
static GLfloat vertices[] = {
-0.5f, -0.5f, -0.5f,
0.5f, -0.5f, -0.5f,
0.5f, -0.5f, 0.5f,
-0.5f, -0.5f, 0.5f,
0.0f, 0.5f, 0.0f,
};
//Colors(RGBAs) for the 5 vertices
static GLfloat colors[] = {
0.0f, 0.0f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 1.0f
};
//Indices for the 4 triangles.
static GLint indices[] = {
2, 4, 3,
1, 4, 2,
0, 4, 1,
4, 0, 3
};
//Set a proportional perspective.
gc.matrixMode(GL_PROJECTION);
gc.loadIdentity();
gc.perspective(16.0, (double)width() / (double)height(), 0.5, 100.0);
gc.matrixMode(GL_MODELVIEW);
gc.clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gc.loadIdentity();
gc.translate(0.0f,0.0f,-1.0f);
gc.lookAt(2.0, 4.0, 6.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
//Rotation around y-axis.
gc.rotate(angle, 0.0, 1.0, 0.0);
try {
OpenGLClientState state1(GL_VERTEX_ARRAY);
OpenGLClientState state2(GL_COLOR_ARRAY);
gc.vertexPointer(3, GL_FLOAT, 0, vertices);
gc.colorPointer (4, GL_FLOAT, 0, colors);
gc.drawElements(GL_TRIANGLES, SizeOf(indices), GL_UNSIGNED_INT, indices);
} catch (Exception& ex) {
caught(ex);
}
}
virtual void resize(int w, int h)
{
if (w == 0 || h == 0) {
return;
}
gc.matrixMode(GL_PROJECTION);
gc.loadIdentity();
gc.perspective(16.0, (double)w / (double)h, 0.5, 40.0);
gc.matrixMode(GL_MODELVIEW);
}
virtual void initialize()
{
gc.enable( GL_DEPTH_TEST );
}
};
// Inner classes end.
///////////////////////////////////////////////////////
Es::HorizontalLayout horiz_layout;
SimpleView simple_view;
public:
//////////////////////////////////////////////
//Constructor
//
MainView(Es::OpenGLApplication& applet, std::string& name, Es::Args& args)
:OpenGLMainView(applet, name, args)
{
int w = (int)args.get(XmNwidth);
int h = (int)args.get(XmNheight);
Es::MainLayout& main_layout = get_main_layout();
main_layout.pack_start(horiz_layout);
horiz_layout.pack_start(simple_view);
OpenGLContext* context = applet.getOpenGLContext();
simple_view.set_opengl_context(context);
simple_view.set_size_request(w, h);
show_all_children();
}
void render()
{
simple_view.render();
}
};
}
int main(int argc, char** argv)
{
Es::Environment env;
try {
std::string name = argv[0];
Es::OpenGLApplication applet(argc, argv);
Es::Args args;
args.set(XmNx, 20);
args.set(XmNy, 40);
args.set(XmNwidth, 400);
args.set(XmNheight, 400);
Es::MainView mainv(applet, name, args);
mainv.show();
applet.run(mainv, 40);
} catch (Es::Exception& ex) {
caught(ex);
} catch (...) {
printf("Get exception \n");
}
return 0;
}