Thread: I present to cprogramming.com: Prongject X

http://i301.photobucket.com/albums/n.../Prongject.jpg

And the source code that makes it all work:

Code:

#include "Paddle.h"
#include "Ball.h"
#include "Textures.h"
#include "Boundaries.h"
#include "vector2.h"

Paddle paddle1;
Paddle paddle2;
Ball ball;
Boundaries border;

class Mechanics
{
public:
	Mechanics(){paddle1.location = Player_1_Start; paddle2.location = Player_2_Start;}
	void check_ball_collision(){ 
		vector2 a_min, a_max, b_min, b_max;
		if(ball.velocity.x > 0){
			a_min = ball.location + ball.d_min;
			a_max = ball.location + ball.d_max;
			b_min = paddle1.location + paddle1.d_min;
			b_max = paddle1.location + paddle1.d_max;
			if (collision2d(a_min, a_max, b_min, b_max))
				{reverse_x_velocity(ball.velocity);}
			else if(ball.location.x > 75)
				{reverse_x_velocity(ball.velocity);}}
		if(ball.velocity.x < 0){
			a_min = ball.location + ball.d_min;
			a_max = ball.location + ball.d_max;
			b_min = paddle2.location + paddle2.d_min;
			b_max = paddle2.location + paddle2.d_max;
			if (collision2d(a_min, a_max, b_min, b_max))
				{reverse_x_velocity(ball.velocity);}
			else if(ball.location.x < -75)
				{reverse_x_velocity(ball.velocity);}}
		if(ball.velocity.y > 0){
			if (ball.location.y > 75)
				{reverse_y_velocity(ball.velocity);}}
		if(ball.velocity.y < 0){
			if (ball.location.y < -75)
				{reverse_y_velocity(ball.velocity);}}}
	void check_paddle_collision(){
		if (paddle1.location.y == 75)
			{reverse_y_velocity(paddle1.location);}
		else if(paddle1.location.y == -75)
			{reverse_y_velocity(paddle1.location);}
		if (paddle2.location.y == 75)
			{reverse_y_velocity(paddle2.location);}
		else if(paddle2.location.y == -75)
			{reverse_y_velocity(paddle2.location);}}
private:	
	bool collision2d(vector2 & a_min, vector2 & a_max, vector2 & b_min, vector2 & b_max) {
	return (a_min.x <= b_max.x) && (a_min.y <= b_max.y) && (a_max.x >= b_min.x) && (a_max.y >= b_min.y);}
	void reverse_y_velocity(vector2 & velocity)
	{velocity.y *= -1;}
	void reverse_x_velocity(vector2 & velocity)
	{velocity.x *= -1;}
};

Mechanics game;

Code:

int DrawGLScene(GLvoid)
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	game.check_ball_collision();
	game.check_paddle_collision();
	border.draw();
	ball.draw(ball.location);
	paddle1.draw();
	paddle2.draw();
	glLoadIdentity();
	return TRUE;
}