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

#include "ofMain.h"

//texture binding with normalised coords
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);
}
void bindTex(ofTexture &tex) {
    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 unbindTex(ofTexture &tex) {
    tex.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();
}
void drawBoard(float x,float y,float z) {
	glPushMatrix();
	glTranslated(x,y,z);
	glBegin(GL_QUADS);
	int cx,cz;
	for (int i=0;i<8;i++) {
		for (int j=0;j<4;j++) {
			cx=((i%2)*16)+(j*32)-56;
			cz=(i*16)-56;
			if ((i==7)&&(j==3)) { //draw special square
				glVertex3f(cx+8, 0, cz-8);
				glVertex3f(cx+8, 0, cz+8);
				glVertex3f(cx+4, 0, cz+4);
				glVertex3f(cx+4, 0, cz-4);

				glVertex3f(cx+4, 0, cz+4);
				glVertex3f(cx+8, 0, cz+8);
				glVertex3f(cx-8, 0, cz+8);
				glVertex3f(cx-4, 0, cz+4);

				glVertex3f(cx-4, 0, cz-4);
				glVertex3f(cx-4, 0, cz+4);
				glVertex3f(cx-8, 0, cz+8);
				glVertex3f(cx-8, 0, cz-8);

				glVertex3f(cx+8, 0, cz-8);
				glVertex3f(cx+4, 0, cz-4);
				glVertex3f(cx-4, 0, cz-4);
				glVertex3f(cx-8, 0, cz-8);
			}
			else {
				glVertex3f(cx+8, 0, cz-8);
				glVertex3f(cx+8, 0, cz+8);
				glVertex3f(cx-8, 0, cz+8);
				glVertex3f(cx-8, 0, cz-8);
			}
		}
	}
	glEnd();
	glPopMatrix();
}
void drawCylinder(float r,float h,float x,float y,float z) {
	glPushMatrix();
	glTranslated(x,y,z);
	glBegin(GL_QUADS);
	float step=TWO_PI/50.0;
	float txstep=1.0/50.0;
	for (float i=0,j=0;i<=TWO_PI;i+=step,j+=txstep) {
		glTexCoord2f(j,0); glVertex3f(cos(i)*r, 0, sin(i)*r);
		glTexCoord2f(j,1); glVertex3f(cos(i)*r, -h, sin(i)*r);
		glTexCoord2f(j+txstep,1); glVertex3f(cos(i+step)*r, -h, sin(i+step)*r);
		glTexCoord2f(j+txstep,0); glVertex3f(cos(i+step)*r, 0, sin(i+step)*r);
	}
	glEnd();
	glPopMatrix();
}