void applyGravity(GPngGame *gPngGame, unsigned char gravityCounter) {
unsigned char baseWeight, currentWeight;
baseWeight = 16;
//ball
currentWeight = baseWeight << gPngGame->ball->weight;
if(!(gravityCounter % currentWeight)) {
setBallXVel(gPngGame->ball->xVel + gPngGame->xGravity, gPngGame->ball);
setBallYVel(gPngGame->ball->yVel + gPngGame->yGravity, gPngGame->ball);
}
//paddle one
currentWeight = baseWeight << gPngGame->paddleOne->weight;
if(!(gravityCounter % currentWeight)) {
setPaddleXVel(gPngGame->paddleOne->xVel + gPngGame->xGravity, gPngGame->paddleOne);
setPaddleYVel(gPngGame->paddleOne->yVel + gPngGame->yGravity, gPngGame->paddleOne);
}
//paddle two
currentWeight = baseWeight << gPngGame->paddleTwo->weight;
if(!(gravityCounter % currentWeight)) {
setPaddleXVel(gPngGame->paddleTwo->xVel + gPngGame->xGravity, gPngGame->paddleTwo);
setPaddleYVel(gPngGame->paddleTwo->yVel + gPngGame->yGravity, gPngGame->paddleTwo);
}
}
void updateBall(Ball *ball, GPINT friction)
{
#ifdef USE_FRICTION
//apply friction
setBallXVel(FPMUL(ball->xVel, friction), ball);
setBallYVel(FPMUL(ball->yVel, friction), ball);
#else
friction = friction;
#endif
// update positions
ball->x += ball->xVel;
ball->y += ball->yVel;
}
void initGameObjects(StartState startState)
{
initDefaultBall(&ball);
initDefaultCourt(&court);
initDefaultPaddleOne(&paddleOne);
initDefaultPaddleTwo(&paddleTwo);
gPngGame.isPlayerOneHuman = 0;
gPngGame.isPlayerTwoHuman = 0;
switch(startState) {
case straightLeft:
paddleTwo.x = FPMAKE(280,0);
paddleTwo.y = FPMAKE(FPINT(gPngGame.court->y), 0);
setBallXVel(-1*FPMAKE(0, 8), &ball);
break;
case straightLeftPaddleTopCollision:
paddleTwo.x = FPMAKE(280,0);
paddleTwo.y = FPMAKE(FPINT(gPngGame.court->y), 0);
paddleOne.x = FPMAKE(35,0);
paddleOne.y = FPMAKE(110,0);
paddleOne.xVel = FPMAKE(0,0);
paddleOne.yVel = FPMAKE(-1,0);
ball.x = FPMAKE(45,0);
ball.y = FPMAKE(100-DEFAULT_BALL_HEIGHT-8,0);
ball.xVel = FPMAKE(-1,0);
ball.yVel = FPMAKE(0,0);
setBallXVel(-1*FPMAKE(0, 8), &ball);
break;
case straightLeftPaddleBottomCollision:
paddleTwo.x = FPMAKE(280,0);
paddleTwo.y = FPMAKE(FPINT(gPngGame.court->y), 0);
paddleOne.x = FPMAKE(35,0);
paddleOne.y = FPMAKE(90,0);
paddleOne.xVel = FPMAKE(0,0);
paddleOne.yVel = FPMAKE(1,0);
ball.x = FPMAKE(45,0);
ball.y = FPMAKE(100+DEFAULT_PADDLE_HEIGHT+8,0);
ball.xVel = FPMAKE(-1,0);
ball.yVel = FPMAKE(0,0);
setBallXVel(-1*FPMAKE(0, 8), &ball);
break;
case straightLeftPaddleNonTopCollision:
paddleOne.x = FPMAKE(24,0);
paddleOne.y = FPMAKE(100,0);
paddleOne.yVel = 0;
paddleOne.xVel = MAX_PADDLE_SPEED_X;
ball.x = FPMAKE(34+DEFAULT_PADDLE_WIDTH,0);
ball.y = FPMAKE(100-DEFAULT_BALL_HEIGHT+1, 0);
ball.xVel = MIN_BALL_SPEED_X;
ball.yVel = 0;
break;
case straightRightNonTopCollision:
paddleOne.x = FPMAKE(344-paddleTwo.width,0);
paddleTwo.y = FPMAKE(100,0);
paddleTwo.yVel = 0;
paddleTwo.xVel = MIN_PADDLE_SPEED_X;
ball.x = FPMAKE(334-ball.width,0);
ball.y = FPMAKE(100-DEFAULT_BALL_HEIGHT+1, 0);
ball.xVel = MAX_BALL_SPEED_X;
ball.yVel = 0;
break;
case straightRightPaddleTopCollision:
paddleTwo.x = FPMAKE(280,0);
paddleTwo.y = FPMAKE(110, 0);
paddleTwo.xVel = FPMAKE(0,0);
paddleTwo.yVel = FPMAKE(-1,0);
paddleOne.x = FPMAKE(35,0);
paddleOne.y = FPMAKE(110,0);
ball.x = FPMAKE(270,0);
ball.y = FPMAKE(100-DEFAULT_BALL_HEIGHT-8,0);
ball.xVel = FPMAKE(1,0);
ball.yVel = FPMAKE(0,0);
setBallXVel(FPMAKE(0, 8), &ball);
break;
case straightRightPaddleBottomCollision:
paddleTwo.x = FPMAKE(280,0);
paddleTwo.y = FPMAKE(90,0);
paddleTwo.xVel = FPMAKE(0,0);
paddleTwo.yVel = FPMAKE(1,0);
paddleOne.x = FPMAKE(35,0);
paddleOne.y = FPMAKE(90,0);
ball.x = FPMAKE(270,0);
ball.y = FPMAKE(100+DEFAULT_PADDLE_HEIGHT+8,0);
ball.xVel = FPMAKE(1,0);
ball.yVel = FPMAKE(0,0);
setBallXVel(FPMAKE(0, 8), &ball);
break;
case straightRightPaddleRearCollision:
paddleOne.x = FPMAKE(DEFAULT_LEFT_ACCAREA_X + DEFAULT_LEFT_ACCAREA_WIDTH - DEFAULT_PADDLE_WIDTH, 0);
paddleOne.y = FPMAKE(100,0);
ball.x = FPMAKE(FPINT(paddleOne.x) - DEFAULT_BALL_WIDTH - 5, 0);
ball.y = FPMAKE(100,0);
setBallXVel(-1*FPMAKE(0, 6), &ball);
setPaddleXVel(FPMAKE(-1,0), &paddleOne);
break;
case straightLeftPaddleRearCollision:
paddleTwo.x = FPMAKE(DEFAULT_RIGHT_ACCAREA_X, 0);
paddleTwo.y = FPMAKE(100,0);
ball.x = FPMAKE(FPINT(paddleTwo.x) + DEFAULT_BALL_WIDTH + 5, 0);
ball.y = FPMAKE(100,0);
setBallXVel(FPMAKE(0, 6), &ball);
setPaddleXVel(FPMAKE(1,0), &paddleTwo);
break;
case noStartState:
gPngGame.isPlayerOneHuman = 1;
gPngGame.isPlayerTwoHuman = 0;
break;
default:
printf("default - please provide a value");
break;
}
assembleDefaultPongGame();
}
