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Ellipse colision

[5 Replies]
- 08-Jan-2013 04:24 PM
- Forum: Programming Questions
So I have this game: It's ellipses moving randomly and you have to hit them. The only thing I need is to make them collide against each other. Can anyone help me?

(to start you have to move the mouse to the ellipse in the middle)

thanks in advance
2. int numBolas = 10;
3. int pont, contador;
4. int bolas_pretas;
5. int contador_tempo=1;
6. int starttime;
8. boolean acertou,ja_entrou,menu=true;
10. Bola myBola = new Bola(20, 20, 1, 0.5);
11. Bola[] bolas = new Bola[numBolas];
13. void setup()
14. {
16. size(500, 500);
17. for (int i=0; i<numBolas;i++) {
18. bolas[i] = new Bola(random(width), random(height), random(1, 6), random(1, 6));
19. }
20. }
22. void draw() {
24. background(255);
25. if(menu==true){
26. fill(255);
27. rect(0,0,width,height);
29. fill(0);
30. text("Posiciona o rato na circufrência para começar", 30, 25);
31. ellipseMode(CENTER);
32. ellipse(width/2,height/2,30,30);
34. //desenho da mira:
35. stroke(2);
36. noFill();
37. ellipse(mouseX, mouseY, 30, 30);
38. line(mouseX+7.5, mouseY, mouseX+22.5, mouseY);
39. line(mouseX-7.5, mouseY, mouseX-22.5, mouseY);
40. line(mouseX, mouseY+7.5, mouseX, mouseY+22.5);
41. line(mouseX, mouseY-7.5, mouseX, mouseY-22.5);
42. }
43. if((mouseX ==width/2) && (mouseY==height/2))menu=false;
45. if(menu==false){
46. text(pont, 30, 25);
49. for (int i=0; i<numBolas; i++) {
50. bolas[i].update();
51. bolas[i].mousePressed();
52. bolas[i].tempo();
53. bolas[i].desenha();
54. }
56. //desenho da mira:
57. stroke(2);
58. noFill();
59. ellipse(mouseX, mouseY, 30, 30);
60. line(mouseX+7.5, mouseY, mouseX+22.5, mouseY);
61. line(mouseX-7.5, mouseY, mouseX-22.5, mouseY);
62. line(mouseX, mouseY+7.5, mouseX, mouseY+22.5);
63. line(mouseX, mouseY-7.5, mouseX, mouseY-22.5);
64. }
66. if (millis()>=starttime+1000) {
67. starttime=millis();
68. contador_tempo++;
69. ja_entrou=false;
70. }
71. if (contador_tempo%10==0) {
72. if(ja_entrou==false){
73. pont--;
74. ja_entrou=true;
75. }
76. }
77. }
79. void mousePressed() {
80. contador_tempo=1;
81. }
82. void mouseReleased() {
84. pont+=5*bolas_pretas;
85. if (bolas_pretas>=4) {
86. pont+=5;
87. }
89. if (acertou==false) {
92. pont-=5;
93. }
94. acertou=false;
95. }
96. class Bola {
97. float ypos, xpos, speedx, speedy, dista, cor1, cor2, cor3;
98. int score=0;
99. boolean count;
100. boolean esta_preta;
102. Bola (float x, float y, float s, float s2) {
103. xpos = x;
104. ypos = y;
105. speedy=s2;
106. speedx = s;
107. cor1=random(50,255);
108. cor2=random(50,255);
109. cor3=random(255);
110. count=true;
111. }
112. void desenha() {
114. fill(cor1, cor2, cor3);
115. ellipse(xpos, ypos, 40, 40);
116. }
118. void update() {
119. xpos += speedx;
120. ypos += speedy;
122. if (xpos>=480) speedx=-random(0.5, 4);
123. if (ypos>=480) speedy=-random(0.5, 4);
124. if (xpos<=20) speedx=random(0.5, 4);
125. if (ypos<=20) speedy=random(0.5, 4);
126. }
128. void mousePressed() {
129. menu=false;
130. if (mousePressed && (mouseButton == LEFT)) {
131. dista=dist(xpos, ypos, mouseX, mouseY);
133. // 15 é o raio das bolas
134. if (dista<=15) {
135. if(esta_preta==false){
136. bolas_pretas++;
137. }
138. acertou=true;
139. count=false;
140. cor1=0;
141. cor2=0;
142. cor3=0;
143. esta_preta=true;
145. }
146. }
147. }
151. void tempo() {
153. score=score+1;
154. if (score>=300) {
156. cor1=random(50,255);
157. cor2=random(50,255);
158. cor3=random(50,255);
160. count=true;
162. bolas_pretas--;
163. esta_preta=false;
164. }
167. if (count) {
168. score=0;
169. }
172. }
173. }

Odds and Evens

[5 Replies]
- 18-Oct-2012 12:40 PM
- Forum: Programming Questions
Hi everyone! New to processing and enjoying it alot but I have a little question.

I would like to do a program that would add all even numbers from 1 to 100.

this is what I have so far:
2. for(int x=0;x<=100;x=x+1){
3. if((x%2)<1){
4. println(x);
5. }
I tried diferente ways but all I could do was add individual numbers like this:
2+2=4

4+4=8

etc

what I really wanted is:

2+4+6+8+etc

is it possible?

Thanks in advanced :D

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