CubeOneSide.cpp

#include "glsupport.h"
#include <glut.h>


GLint program;
GLuint vertPostionVBO;
GLuint positionAttribute;

void display(void) {
	glClear(GL_COLOR_BUFFER_BIT);

	glUseProgram(program);
	glBindBuffer(GL_ARRAY_BUFFER, vertPostionVBO);

	glVertexAttribPointer(positionAttribute, 2, GL_FLOAT, GL_FALSE, 0, 0);
	glEnableVertexAttribArray(positionAttribute);

	glDrawArrays(GL_TRIANGLES, 0, 6);

	glDisableVertexAttribArray(positionAttribute);

	glutSwapBuffers();
}

void init() {
	glCullFace(GL_BACK);
	glEnable(GL_CULL_FACE);
	glEnable(GL_DEPTH_TEST);
	glDepthFunc(GL_LESS);
	glReadBuffer(GL_BACK);

	glClearColor(0.2, 0.2, 0.2, 0.0);
	program = glCreateProgram();
	readAndCompileShader(program, "vertex.glsl", "fragment.glsl");

	glUseProgram(program);
	positionAttribute = glGetAttribLocation(program, "position");

	glGenBuffers(1, &vertPostionVBO);
	glBindBuffer(GL_ARRAY_BUFFER, vertPostionVBO);

	GLfloat sqVert[12] = {
		-0.5f, -0.5f,
		0.5f, -0.5f,
		0.5f, 0.5f,

		-0.5f, -0.5f,
		-0.5f, 0.5f,
		0.5f, 0.5f
	};

	GLfloat cubeVerts[] = {
		-0.5f, -0.5f, 0.0f,
		0.5f, -0.5f, 0.0f,
		0.5f, 0.5f, 0.0f,

		-0.5f, -0.5f, 0.0f,
		-0.5f, 0.5f, 0.0f,
		0.5f, 0.5f, 0.0f
	};

	glBufferData(GL_ARRAY_BUFFER, 18 * sizeof(GLfloat), cubeVerts, GL_STATIC_DRAW);
	

}

void reshape(int w, int h) {
	glViewport(0, 0, w, h);
}

void idle(void) {
	glutPostRedisplay();
}

int main(int argc, char **argv) {
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB | GLUT_DEPTH);
	glutInitWindowSize(500, 500);
	glutCreateWindow("CS - 6533");
	glEnable(GL_DEPTH_TEST);
	glewInit();

	glutDisplayFunc(display);
	glutReshapeFunc(reshape);
	glutIdleFunc(idle);

	init();
	glutMainLoop();
	return 0;
}