#include "SDL.h"
#include "SDL_opengl.h"

#include "glpong3d.h"
#include "paddle.h"

void
GLPong_PaddleDrawBack(const Paddle_t * paddle) {
	glLoadIdentity();
	glBindTexture(GL_TEXTURE_2D, paddle_texture);
	glEnable(GL_TEXTURE_2D);
	glColor3f(paddle->r, paddle->g, paddle->b);
	glTranslatef(paddle->coord.x, paddle->coord.y, paddle->coord.z);
	glBegin(GL_QUADS);
		glTexCoord2f(0.832f, 1.0f); glVertex2f(paddle->w / 2, paddle->h / 2);	/* Upper Right */
		glTexCoord2f(0.168f, 1.0f); glVertex2f(-paddle->w / 2, paddle->h / 2);	/* Upper Left  */
		glTexCoord2f(0.168f, 0.0f); glVertex2f(-paddle->w / 2, -paddle->h / 2);	/* Lower Left */
		glTexCoord2f(0.832f, 0.0f); glVertex2f(paddle->w / 2, -paddle->h / 2);	/* Lower Right */	
	glEnd();
	glDisable(GL_TEXTURE_2D);

#ifdef DEBUG
	glLoadIdentity();
	glColor3f(1.0f, 0.0f, 0.0f);
	glTranslatef(paddle->coord.x, paddle->coord.y, paddle->coord.z);
	glBegin(GL_POINTS);
		glVertex3f(0.0f, 0.0f, 0.0f);
	glEnd();
#endif
}

void
GLPong_PaddleDrawFront(const Paddle_t * paddle) {
	glLoadIdentity();
	glBindTexture(GL_TEXTURE_2D, paddle_texture);
	glEnable(GL_TEXTURE_2D);
	glColor3f(paddle->r, paddle->g, paddle->b);
	glTranslatef(paddle->coord.x + (paddle->w / 2), paddle->coord.y + (paddle->h / 2), paddle->coord.z); /* XXX: why does this line differ from above? */
	glBegin(GL_QUADS);
		glTexCoord2f(0.168f, 1.0f); glVertex2f(paddle->w / 2, paddle->h / 2);	/* Upper Right */
		glTexCoord2f(0.832f, 1.0f); glVertex2f(-paddle->w / 2, paddle->h / 2);	/* Upper Left  */
		glTexCoord2f(0.832f, 0.0f); glVertex2f(-paddle->w / 2, -paddle->h / 2);	/* Lower Left */
		glTexCoord2f(0.168f, 0.0f); glVertex2f(paddle->w / 2, -paddle->h / 2);	/* Lower Right */
		glEnd();
	glDisable(GL_TEXTURE_2D);

#ifdef DEBUG
	/* Lower Left */
	glLoadIdentity();
	glColor3f(1.0f, 0.0f, 0.0f);
	glTranslatef(paddle->coord.x, paddle->coord.y, paddle->coord.z);
	glBegin(GL_POINTS);
		glVertex3f(0.0f, 0.0f, 0.0f);
	glEnd();

	/* Lower Right */
	glLoadIdentity();
	glTranslatef(paddle->coord.x + paddle->w, paddle->coord.y, paddle->coord.z);
	glBegin(GL_POINTS);
		glVertex3f(0.0f, 0.0f, 0.0f);
	glEnd();
	
	/* Top Right */
	glLoadIdentity();
	glTranslatef(paddle->coord.x + paddle->w, paddle->coord.y + paddle->h, paddle->coord.z);
	glBegin(GL_POINTS);
		glVertex3f(0.0f, 0.0f, 0.0f);
	glEnd();
	/* Top Left */
	glLoadIdentity();
	glTranslatef(paddle->coord.x, paddle->coord.y + paddle->h, paddle->coord.z);
	glBegin(GL_POINTS);
		glVertex3f(0.0f, 0.0f, 0.0f);
	glEnd();
#endif
}