SOL9 Sample: TriangleShader
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1 Screenshot
2 Source code
/*
* TriangleShader.cpp
* Copyright (c) 2015 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
*/
#include <sol/opengl/OpenGLMainView.h>
#include <sol/opengl/OpenGLView.h>
#include <sol/opengl/OpenGLGC.h>
#include <sol/opengl/OpenGLVertex3.h>
#include <sol/opengl/OpenGLClientState.h>
#include <sol/opengl2/OpenGLVertexShader.h>
#include <sol/opengl2/OpenGLFragmentShader.h>
#include <sol/opengl2/OpenGLProgram.h>
#include <sol/opengl2/OpenGLVertexAttribute.h>
#include "Resource.h"
namespace SOL {
class MainView :public OpenGLMainView {
private:
//Inner class starts.
class SimpleView: public OpenGLView {
private:
OpenGLGC* gc;
OpenGLProgram* program;
public:
virtual void display()
{
gc -> clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gc -> loadIdentity();
program -> use();
OpenGLClientState clientState(GL_VERTEX_ARRAY);
const GLfloat vertex[] = {
0.0f, 0.5f,
-0.5f, -0.5f,
0.5f, -0.5f
};
GLint pos = program -> getAttributeLocation("pos");
OpenGLVertexAttribute attribute(pos);
attribute.setPointer(2, GL_FLOAT, GL_FALSE, 0, vertex);
gc -> drawArrays(GL_TRIANGLES, 0, 3);
}
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 = new OpenGLGC();
gc -> matrixMode(GL_PROJECTION);
gc -> loadIdentity();
gc -> enable( GL_DEPTH_TEST );
gc -> frustum(1 , -1 , -1 , 1 , 1 , 10);
gc -> clearColor(0.0, 0.0, 1.0, 1.0);
try {
OpenGLVertexShader vertexShader;
const GLchar *vertShaderSource =
"attribute mediump vec4 pos;"
"void main() {"
" gl_Position = pos;"
"}";
vertexShader.shaderSource(1, &vertShaderSource, NULL);
vertexShader.compile();
OpenGLFragmentShader fragmentShader;
const GLchar *fragShaderSource =
"void main() {"
" gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);" //RED color
"}";
fragmentShader.shaderSource(1, &fragShaderSource, NULL);
fragmentShader.compile();
program = new OpenGLProgram();
program -> attachShader(vertexShader);
program -> attachShader(fragmentShader);
program -> link();
program -> detachShader(vertexShader);
program -> detachShader(fragmentShader);
} catch (Exception& ex) {
ex.display();
}
}
public:
SimpleView(View* parent, const char* name, Args& args)
:OpenGLView(parent, name, args),
gc(NULL),
program(NULL)
{
}
~SimpleView()
{
delete gc;
delete program;
}
};
//Inner class ends.
private:
SimpleView* view;
long size(Event& event)
{
int w, h;
event.getSize(w, h);
view -> reshape(10, 10, w-20, h-20);
view -> postResizeRequest(w-20, h-20);
return 1L;
}
public:
MainView(Application& applet, const char* name, Args& args)
:OpenGLMainView(applet, name, args)
{
Args ar;
view = new SimpleView(this, "", ar);
}
~MainView()
{
delete view;
}
};
}
//
void Main(int argc, char** argv)
{
try {
const char* name = appName(argv[0]);
Application applet(name, argc, argv);
Args args;
args.set(XmNwidth, 400);
args.set(XmNheight, 300);
MainView view(applet, name, args);
view.realize();
applet.run();
} catch (Exception& ex) {
ex.display();
}
}
Last modified: 8 Dec 2016
Copyright (c) 2016 Antillia.com ALL RIGHTS RESERVED.