//
//  GLViewController.m
//  Isometric
//
//  Created by Mac Admin on 05/01/2010.
//  Copyright __MyCompanyName__ 2010. All rights reserved.
//

#import "GLViewController.h"
#import "ConstantsAndMacros.h"
#import "OpenGLCommon.h"
@implementation GLViewController

static GLuint texture[1];

- (void)drawView:(UIView *)theView
{

	//Clear some stuff
    glColor4f(0.0, 0.0, 0.0, 0.0);
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glClearColor(1.0,1.0,1.0,1.0);
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	//Drawing Setup
    glEnableClientState(GL_VERTEX_ARRAY);
    glEnableClientState(GL_NORMAL_ARRAY);
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);

	//Rendering
    glLoadIdentity();
	glRotatef(-90.0,0.0,0.0,1.0); 														//Because we are using the device in landscape mode.
	glTranslatef(0.0,0.0,-10.0); 														//Pull the camera back
	glRotatef(45,1.0,0.0,0.0);	  														//tilt the camera so it's looking slightly downwards
	glBindTexture(GL_TEXTURE_2D, texture[0]);											//Bind Level Texture
    glVertexPointer(3, GL_FLOAT, 0, vertices);											//Give OpenGL the Level Vertices
	glNormalPointer(GL_FLOAT, 0, normals);												//Give OpenGL the Level Vertex Normals
    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);										//Give OpenGL the Level Texture Coordinates
	glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, polygons);						//Tell OpenGL to draw the Level
	/* PREVIOUS 4 LINES NEED THE DATA FROM THE PLIST */

	//Drawing Unsetup
    glDisableClientState(GL_VERTEX_ARRAY);
    glDisableClientState(GL_NORMAL_ARRAY);
    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
-(void)setupView:(GLView*)view
{
	/* LOAD THE PLIST DATA HERE? */

	const GLfloat zNear = 0.01, zFar = 1000.0, fieldOfView = 45.0;
	GLfloat size;
	glEnable(GL_DEPTH_TEST);
	glMatrixMode(GL_PROJECTION);
	size = zNear * tanf(DEGREES_TO_RADIANS(fieldOfView) / 2.0);
	CGRect rect = view.bounds;
	glFrustumf(-size, size, -size / (rect.size.width / rect.size.height), size / (rect.size.width / rect.size.height), zNear, zFar);
	glViewport(0, 0, rect.size.width, rect.size.height);
	glMatrixMode(GL_MODELVIEW);

	glLoadIdentity();

	// Turn necessary features on
    glEnable(GL_TEXTURE_2D);
    glEnable(GL_BLEND);
    glBlendFunc(GL_ONE, GL_SRC_COLOR);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    glGenTextures(1, &texture[0]);

	glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
	loadTexture(@"Tex");


    glEnable(GL_LIGHTING);

    // Turn the first light on
    glEnable(GL_LIGHT0);

    // Define the ambient component of the first light
    static const Color3D light0Ambient[] = {{1.0, 1.0, 1.0, 1.0}};
	glLightfv(GL_LIGHT0, GL_AMBIENT, (const GLfloat *)light0Ambient);

    // Define the diffuse component of the first light
    static const Color3D light0Diffuse[] = {{1.0, 1.0, 1.0, 1.0}};
	glLightfv(GL_LIGHT0, GL_DIFFUSE, (const GLfloat *)light0Diffuse);

    // Define the position of the first light
     const GLfloat light0Position[] = {10.0, 10.0, 10.0};
    //Vertex3D light0Position[] = {{0.0, 0.0, 0.0}};
	glLightfv(GL_LIGHT0, GL_POSITION, (const GLfloat *)light0Position);

	glEnable(GL_CULL_FACE);
	glCullFace(GL_BACK);
}
- (void)dealloc
{
    [super dealloc];
}
@end