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Minor changes to examples, more code color tweaks for 2b8

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This commit is contained in:
Casey Reas
2012-12-20 03:21:07 +00:00
parent cebf10855e
commit 234cbdd85f
13 changed files with 114 additions and 138 deletions
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java/examples/Topics/Motion/CircleCollision/CircleCollision.pde
+13 -8
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@@ -5,7 +5,8 @@
* Based on Keith Peter's Solution in
* Foundation Actionscript Animation: Making Things Move!
*/
Ball[] balls = {
new Ball(100, 400, 20),
new Ball(700, 400, 80)
@@ -24,7 +25,7 @@ void setup() {
void draw() {
background(51);
fill(204);
for (int i=0; i< 2; i++){
for (int i = 0; i < 2; i++){
balls[i].x += vels[i].x;
balls[i].y += vels[i].y;
ellipse(balls[i].x, balls[i].y, balls[i].r*2, balls[i].r*2);
@@ -52,7 +53,8 @@ void checkObjectCollision(Ball[] b, PVector[] v){
/* bTemp will hold rotated ball positions. You
just need to worry about bTemp[1] position*/
Ball[] bTemp = {
new Ball(), new Ball() };
new Ball(), new Ball()
};
/* b[1]'s position is relative to b[0]'s
so you can use the vector between them (bVect) as the
@@ -65,7 +67,8 @@ void checkObjectCollision(Ball[] b, PVector[] v){
// rotate Temporary velocities
PVector[] vTemp = {
new PVector(), new PVector() };
new PVector(), new PVector()
};
vTemp[0].x = cosine * v[0].x + sine * v[0].y;
vTemp[0].y = cosine * v[0].y - sine * v[0].x;
vTemp[1].x = cosine * v[1].x + sine * v[1].y;
@@ -75,14 +78,15 @@ void checkObjectCollision(Ball[] b, PVector[] v){
conservation of momentum equations to calculate
the final velocity along the x-axis. */
PVector[] vFinal = {
new PVector(), new PVector() };
new PVector(), new PVector()
};
// final rotated velocity for b[0]
vFinal[0].x = ((b[0].m - b[1].m) * vTemp[0].x + 2 * b[1].m *
vTemp[1].x) / (b[0].m + b[1].m);
vTemp[1].x) / (b[0].m + b[1].m);
vFinal[0].y = vTemp[0].y;
// final rotated velocity for b[0]
vFinal[1].x = ((b[1].m - b[0].m) * vTemp[1].x + 2 * b[0].m *
vTemp[0].x) / (b[0].m + b[1].m);
vTemp[0].x) / (b[0].m + b[1].m);
vFinal[1].y = vTemp[1].y;
// hack to avoid clumping
@@ -94,7 +98,8 @@ void checkObjectCollision(Ball[] b, PVector[] v){
in the opposite direction */
// rotate balls
Ball[] bFinal = {
new Ball(), new Ball() };
new Ball(), new Ball()
};
bFinal[0].x = cosine * bTemp[0].x - sine * bTemp[0].y;
bFinal[0].y = cosine * bTemp[0].y + sine * bTemp[0].x;
bFinal[1].x = cosine * bTemp[1].x - sine * bTemp[1].y;