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SImple Touch Path Sketch

[1 Reply]
- 21-Jan-2013 08:59 PM
- Forum: Android Processing
I've made a simple sketch that draws a line for an object to follow at an specified speed. I'm curious to see how others would implement this or if there is a commonly used solution for this already.
2. import android.view.MotionEvent;
4. PFont junction;
5. int currentTime;
6. int lastTime;
7. Mover mover;
8. boolean touched;
10. void setup(){
11. size( displayWidth, displayHeight );
12. orientation( PORTRAIT );
13. strokeWeight(1.5);
14. mover = new Mover();
15. junction = createFont("Junction.otf", 32);
16. textFont( junction , 32);
17. lastTime = millis();
18. touched = false;
19. }
21. void draw(){
22. background(255);
23. mover.display();
24. mover.update();
25. fill(0);
26. text( "Point size: " + mover.motionLine.points.size(), 10, 50);
27. text( "Frame Rate: " + frameRate, 10, 100);
28. }
30. public boolean surfaceTouchEvent( MotionEvent event ){
31. int action = event.getAction();
33. switch( action ){
35. case MotionEvent.ACTION_DOWN: {
36. currentTime = millis();
37. if(mover.motionLine.isEnd == true){
38. mover.isMoving = false;
39. mover.motionLine.clearLine();
40. mover.motionLine.isEnd = false;
41. }
42. if(dist( event.getX(), event.getY(), mover.position.x, mover.position.y ) < 25){
43. touched = true;
44. mover.motionLine.add( mover.position.x, mover.position.y );
45. }
46. lastTime = currentTime;
47. break;
48. }
50. case MotionEvent.ACTION_MOVE: {
51. if(touched){
52. currentTime = millis();
53. if((currentTime - lastTime) > 25){
54. mover.motionLine.add( event.getX(), event.getY() );
55. lastTime = currentTime;
56. }
58. }
59. break;
60. }
62. case MotionEvent.ACTION_UP: {
63. if(touched){
64. mover.motionLine.isEnd = true;
65. mover.startMoving();
66. touched = false;
67. }
68. break;
69. }
70. } // end switch
72. return super.surfaceTouchEvent( event );
73. } // end surfaceTouchEvent
76. class MotionLine {
78. ArrayList<PVector> points;
79. int max; /* max number of points before reset */
80. boolean isEnd;
82. MotionLine(){
83. isEnd = false;
84. points = new ArrayList<PVector>();
85. max = 50;
86. }
88. void display(){
89. for(int i = 1; i < points.size() - 1; i++){
90. PVector last = points.get( i-1 );
91. PVector current = points.get( i );
92. line(last.x, last.y, current.x, current.y);
93. }
94. } // end display
96. void add( float x, float y ){
97. if( points.size() == max ){
98. isEnd = true;
99. }else{
100. points.add( new PVector(x, y) );
101. }
102. } // end add
104. void clearLine(){
105. points.clear();
106. }
108. void resetLine(){
109. clearLine();
110. isEnd = false;
111. }
113. } // end MotionLine
116. class Mover {
118. PVector position;
119. PVector velocity;
120. PVector target;
121. float speed;
122. MotionLine motionLine;
123. boolean isMoving;
124. int lineSize;
125. int pointIndex;
127. Mover(){
128. position = new PVector(100, 100);
129. velocity = new PVector(0, 0);
130. target = new PVector(0, 0);
131. speed = 2.5;
132. motionLine = new MotionLine();
133. isMoving = false;
134. pointIndex = 1;
135. }
137. void display(){
138. ellipse(position.x, position.y, 50, 50);
139. motionLine.display();
140. }
142. void update(){
143. if( isMoving ){
144. position.add( velocity );
146. if(dist( position.x, position.y, target.x, target.y ) <= speed){
147. if( pointIndex == lineSize ){
148. isMoving = false;
149. motionLine.clearLine();
150. velocity.set(0, 0, 0);
151. pointIndex = 1;
152. }else{
153. pointIndex++;
154. getNextTarget( motionLine.points.get( pointIndex ) );
155. }
156. }
158. }
159. } // end update
161. void calcVelocity(){
162. PVector displacement = PVector.sub( target, position );
163. displacement.normalize();
164. displacement.mult( speed );
165. velocity = displacement;
166. }
168. void getNextTarget( PVector t ){
169. target.set(t);
170. calcVelocity();
171. }
173. void startMoving(){
174. lineSize = motionLine.points.size() - 1;
175. if(lineSize > 1){
176. getNextTarget( motionLine.points.get( pointIndex ));
177. isMoving = true;
178. }
179. }
180. } // end Mover

Multi key input for videogame?

[1 Reply]
- 09-Jul-2011 12:46 AM
- Forum: Programming Questions
Right now I'm using,

if(keyPressed) {

if(key == 's' || key == 'S') {

// Move

}

}

and so with the WASD keys i can only get movement in one direction. Any help would be appreciated.

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