Processing Forum

Screen name:
gennarosenatore

gennarosenatore's Profile

2 Posts

7 Responses

0 Followers

Activity Trend

Last 30 days

Loading Chart...

Show:

Expanded view
List view

proscene camera relative drawing

[4 Replies]
- 06-Sep-2012 03:09 AM
- Forum: Contributed Library Questions
What do you think is the best way to have just one object (for instance a box with attached interactive frame) not to follow the main camera frame but still preserving the local interactive frame mouse handling ?

within the context of a GUI for a CAD tool, the reason for having this is to let the user to easily set the "drawing plane" a plane in 3D where they can draw points, curves and all sort of objects.....

i.e.
- user moves the main camera but the box stay always in the same position
- user mouse over the box so that it spins as the interactive frame gets rotated and in so doing drawing plane is set
in a way the box should be drawn almost as it was part of the 2D gui, but it can’t be a 2d objects as user need to rotate it. If you've ever used Revit (AutoDesk) is pretty much the same way they do

let me know if you’ve got some idea.

--

Gennaro

proscene, pixel picking

[1 Reply]
- 12-Oct-2011 05:36 PM
- Forum: Contributed Library Questions
hello All,

I'm trying to use an auxiliary buffer to draw objects that I don't want to display in the main scene
the reason for this is to be able to pick objects like lines for which would be very expensive to draw boxes
also I want to be able to pick the lines at any point along their length and not just in the middle (for instance if using proscene interactiveFrame and placing a point in the middle)
I've seen the example here, where a Scene is instantiated using an auxiliary buffer and then in the main draw-method it uses buffer.beginDraw and scene.BeginDraw etc. etc.
but this is doing the opposite of what I want since it is drawing and displaying everything in the auxiliary buffer....

I attach here the code, the picking for the lines it is a simple "pixel based picking" (original code here) so that each lines is draw in both the main scene and in the auxiliary buffer. In the auxiliary buffer each line is drawn with a different color so that it is easy to pick them. In the main scene the lines are just drawn in black. This works fine with any cam I tried so far as long as the camera of the buffer is synchronized with that of the main scene (i.e. cam.getState().apply(buffer))

any solutions using proscene and some HUD with controlP5 (see the code below) ?
1. import remixlab.proscene.*;
2. import controlP5.*;
3. import processing.opengl.*;
4. ControlP5 controlP5;
5. Scene scene;
6. PGraphics backBuffer;
7. PGraphics backBuffer2;
8. PGraphics3D backBuffer3D;
9. ArrayList<box> boxes;
10. ArrayList<line3D> myLines;
11. PApplet aa;
12. void setup()
13. {
14. size(500, 500, OPENGL);
15. smooth();
16. backBuffer = createGraphics(width, height, P3D);
17. backBuffer3D=(PGraphics3D)this.g;
18. backBuffer2 = createGraphics(width, height, P3D);
19. scene = new Scene(this);
20. // press 'f' to display frame selection hints
21. scene.setShortcut('f', Scene.KeyboardAction.DRAW_FRAME_SELECTION_HINT);
22. controlP5 = new ControlP5(this);
23. controlP5.addButton("button", 10, 100, 60, 80, 20).setId(1);
24. controlP5.addButton("buttonValue", 4, 100, 90, 80, 20).setId(2);
25. controlP5.setAutoDraw(false);
26. boxes = new ArrayList<box>();
27. for (int i = 0; i < 50; i++)
28. {
29. box obj = new box(15f, 15f, 15f, i);
30. boxes.add(obj);
31. }
32. myLines= new ArrayList<line3D>();
33. for (int i = 0; i < boxes.size()-1; i++)
34. {
35. line3D obj = new line3D(boxes.get(i).mFrame.position(), boxes.get(i+1).mFrame.position(), i);
36. myLines.add(obj);
37. }
38. }
39. void draw()
40. {
41. background(255);
42. stroke(0);
43. strokeWeight(2);
44. Iterator it = boxes.iterator();
45. while (it.hasNext ())
46. {
47. box obj = (box)it.next();
48. pushMatrix();
49. obj.display();
50. popMatrix();
51. }
52. for (int i = 0; i < boxes.size()-1; i++)
53. {
54. myLines.get(i).display(g, boxes.get(i).mFrame.position(), boxes.get(i+1).mFrame.position());
55. }
56. backBuffer.beginDraw();
57. for (int i = 0; i < boxes.size()-1; i++)
58. {
59. myLines.get(i).drawBuffer(backBuffer);
60. }
61. backBuffer.endDraw();
62. backBuffer.applyMatrix(backBuffer3D.camera);
64. //HUD to be implemented
65. //drawGUI();
66. }
67. void drawGUI()
68. {
69. controlP5.draw();
70. }
71. // test your frame rate, mine is ~40fps
72. void keyPressed()
73. {
74. if (key == 'x') println(frameRate);
75. }
76. void mouseClicked()
77. {
78. // get the pixel color under the mouse
79. color pick = backBuffer.get(mouseX, mouseY);
80. // get object id
81. int id = getId(pick);
82. print(id);
83. // if id > 0 (background id = -1)
84. if (id >= 0 & id< myLines.size())
85. {
86. // change the line color
87. myLines.get(id).changeColor();
88. }
89. }
90. // color -2 gives 0, etc.
91. int getId(color c)
92. {
93. return -(c + 2);
94. }
95. // id 0 gives color -2, etc.
96. color getColor(int id)
97. {
98. return -(id + 2);
99. }
100. ////////////////////////////////////////////////////////
101. class box
102. {
103. public float mWidth,mHeight,mDepth;
104. public PVector mPosition;
105. public InteractiveFrame mFrame;
106. public int ID;
107. public boolean selected;
108. box(float w, float h, float d, int ID)
109. {
110. mWidth = w; mHeight = h;mDepth = d;
111. this.ID=ID;
112. float low = -100;float high = 100;
113. mPosition = new PVector(random(low, high), random(low, high), random(low, high));
114. mFrame = new InteractiveFrame(scene);mFrame.setPosition(mPosition);
115. }
116. void display()
117. {
118. // No need to call translationbackBuffer.translate(mPosition.x, mPosition.y, mPosition.z);
119. // Frame.applyTransformation does it.
120. mFrame.applyTransformation();
121. isSelected();
122. if (selected==true)
123. {
124. g.fill(255, 0, 0);
125. }
126. else
127. {
128. g.fill(200);
129. }
130. g.stroke(0);
131. g.box(mWidth, mHeight, mDepth);
132. }
133. public void isSelected()
134. {
135. if (mFrame.grabsMouse())
136. {
137. selected=true;
138. }
139. else
140. {
141. selected=false;
142. }
143. }
144. }
145. ////////////////////////////////////////////////////////
146. class line3D
147. {
148. // variables
149. int id; // id
150. color c; // color (in scene, not buffer)
151. public PVector p0;
152. public PVector p1;
153. // constructor
154. public line3D(PVector p0, PVector p1, int id)
155. {
156. this.id=id;this.p0=p0;
157. this.p1=p1;c = color(0, 0, 0);
158. }
159. // make the color change
160. public void changeColor()
161. {
162. int r = (int)red(c);int g = (int)green(c);
163. int b = (int)blue(c);c = color(255-c, 0, 0);
164. }
165. // display the line on screen
166. public void display(PGraphics ecran,PVector p0,PVector p1)
167. {
168. this.p0=p0;this.p1=p1;
169. ecran.stroke(c);drawLine(ecran);
170. }
171. // draw the line in the buffer
172. public void drawBuffer(PGraphics buffer)
173. {
174. color idColor = getColor(id);buffer.strokeWeight(10);
175. buffer.stroke(idColor);drawLine(buffer);
176. }
177. private void drawLine(PGraphics g)
178. {
179. g.line(p0.x, p0.y, p0.z, p1.x, p1.y, p1.z);
180. }
181. }

«Prev
Next »