/*
 * mapUtils.h
 *
 *  Created by Tim Redfern on 20/12/2011.
 *  global utils for projection mapping
 *
 */
#pragma once

#include "ofMain.h"

void bindTexture(ofBaseHasTexture &t) {
    ofTexture &tex = t.getTextureReference();
    tex.bind();

    glMatrixMode(GL_TEXTURE);
    glPushMatrix();
    glLoadIdentity();

    ofTextureData texData = tex.getTextureData();
    if(texData.textureTarget == GL_TEXTURE_RECTANGLE_ARB) {
        glScalef(tex.getWidth(), tex.getHeight(), 1.0f);
    } else {
        glScalef(tex.getWidth() / texData.tex_w, tex.getHeight() / texData.tex_h, 1.0f);
    }

    glMatrixMode(GL_MODELVIEW);
}
void unbindTexture(ofBaseHasTexture &t) {
    t.getTextureReference().unbind();

    glMatrixMode(GL_TEXTURE);
    glPopMatrix();
    glMatrixMode(GL_MODELVIEW);
}
ofPoint distort(ofPoint pt,float d){
    //normalised coords -1..1, d
    float r=pow(pow(pow(pt.x,2.0f)+pow(pt.y,2.0f),0.5f),1.0f+d);
    float a=atan2f(pt.x,pt.y);
    return ofPoint(r*sin(a),r*cos(a));
};

void drawBox(float size) {
    // this func just draws a perfectly normal box with some texture coordinates
    glBegin(GL_QUADS);
        // Front Face
        glTexCoord2f(0.0f, 0.0f); glVertex3f(-size, -size,  size);	// Bottom Left Of The Texture and Quad
        glTexCoord2f(1.0f, 0.0f); glVertex3f( size, -size,  size);	// Bottom Right Of The Texture and Quad
        glTexCoord2f(1.0f, 1.0f); glVertex3f( size,  size,  size);	// Top Right Of The Texture and Quad
        glTexCoord2f(0.0f, 1.0f); glVertex3f(-size,  size,  size);	// Top Left Of The Texture and Quad
        // Back Face
        glTexCoord2f(1.0f, 0.0f); glVertex3f(-size, -size, -size);	// Bottom Right Of The Texture and Quad
        glTexCoord2f(1.0f, 1.0f); glVertex3f(-size,  size, -size);	// Top Right Of The Texture and Quad
        glTexCoord2f(0.0f, 1.0f); glVertex3f( size,  size, -size);	// Top Left Of The Texture and Quad
        glTexCoord2f(0.0f, 0.0f); glVertex3f( size, -size, -size);	// Bottom Left Of The Texture and Quad
        // Top Face
        glTexCoord2f(0.0f, 1.0f); glVertex3f(-size,  size, -size);	// Top Left Of The Texture and Quad
        glTexCoord2f(0.0f, 0.0f); glVertex3f(-size,  size,  size);	// Bottom Left Of The Texture and Quad
        glTexCoord2f(1.0f, 0.0f); glVertex3f( size,  size,  size);	// Bottom Right Of The Texture and Quad
        glTexCoord2f(1.0f, 1.0f); glVertex3f( size,  size, -size);	// Top Right Of The Texture and Quad
        // Bottom Face
        glTexCoord2f(1.0f, 1.0f); glVertex3f(-size, -size, -size);	// Top Right Of The Texture and Quad
        glTexCoord2f(0.0f, 1.0f); glVertex3f( size, -size, -size);	// Top Left Of The Texture and Quad
        glTexCoord2f(0.0f, 0.0f); glVertex3f( size, -size,  size);	// Bottom Left Of The Texture and Quad
        glTexCoord2f(1.0f, 0.0f); glVertex3f(-size, -size,  size);	// Bottom Right Of The Texture and Quad
        // Right face
        glTexCoord2f(1.0f, 0.0f); glVertex3f( size, -size, -size);	// Bottom Right Of The Texture and Quad
        glTexCoord2f(1.0f, 1.0f); glVertex3f( size,  size, -size);	// Top Right Of The Texture and Quad
        glTexCoord2f(0.0f, 1.0f); glVertex3f( size,  size,  size);	// Top Left Of The Texture and Quad
        glTexCoord2f(0.0f, 0.0f); glVertex3f( size, -size,  size);	// Bottom Left Of The Texture and Quad
        // Left Face
        glTexCoord2f(0.0f, 0.0f); glVertex3f(-size, -size, -size);	// Bottom Left Of The Texture and Quad
        glTexCoord2f(1.0f, 0.0f); glVertex3f(-size, -size,  size);	// Bottom Right Of The Texture and Quad
        glTexCoord2f(1.0f, 1.0f); glVertex3f(-size,  size,  size);	// Top Right Of The Texture and Quad
        glTexCoord2f(0.0f, 1.0f); glVertex3f(-size,  size, -size);	// Top Left Of The Texture and Quad
    glEnd();
}