02_dot.cpp

// This is for GLUT

#include <GL/glew.h>
#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#include <GLUT/glut.h>
#include "math_3d.h"

GLuint VBO;

void render (void) {
	glClear(GL_COLOR_BUFFER_BIT);

	glEnableVertexAttribArray(0);
	glBindBuffer(GL_ARRAY_BUFFER, VBO);
	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
	glDrawArrays(GL_POINTS, 0, 1);
	glDisableVertexAttribArray(0);
	 
	glutSwapBuffers();
}

int main (int argc, char** argv) {
	// initialize GLUT
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);
	glutInitWindowSize(1024, 768); 
	glutInitWindowPosition(100, 100);
	glutCreateWindow("Tutorial 02");

	// render
	glutDisplayFunc(render);

	// init func
	GLenum res = glewInit();
	if (res != GLEW_OK)
	{
	    fprintf(stderr, "Error: '%s'\n", glewGetErrorString(res));
	    return 1;
	}

	Vector3f Vertices[1];
	Vertices[0] = Vector3f(0.0f, 0.0f, 0.0f);
	
	glGenBuffers(1, &VBO);
	glBindBuffer(GL_ARRAY_BUFFER, VBO);
	glBufferData(GL_ARRAY_BUFFER, sizeof(Vertices), Vertices, GL_STATIC_DRAW);

	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
	
	glutMainLoop();

	return 0;
}