Processing Forum

[toxiclibs] Apply gradient to Polygon2D?

[2 Replies]
- 10-Jun-2011 03:18 AM
- Forum: Contributed Library Questions
Does someone have an example of how to apply a gradient to a Polygon2D?

Thanks in advance.

setRadius(); in physics2d (toxiclibs)

[3 Replies]
- 09-Jun-2011 08:35 AM
- Forum: Contributed Library Questions
Okay, I just have a quick question. I'm tried to use setRadius() on a physics2d AttractionBehavior instance and in return I get told that it's set to private. I've been looking around the source files for a bit now and saw that it has been turned public since a while.

The problem is this. I havent got the slightest idea about how to compile all that stuff though. Could someone either provide a link to the updated lib or, preferably, explain me how to compile a .jar from the source files?

Cheers.

Spherical Heightmap

[7 Replies]
- 16-May-2011 06:45 AM
- Forum: Contributed Library Questions
Hi!

I'm trying to add a heightmap to a sphere with an GLModel since I need quite a lot of vertices to render a somewhat realistic model of Mars. (the one below has 250.000 vertices, although im planning to use 10.000 in the final version through the use of a normal map).

I started out using the TexturedSphere example from GLGraphics but quickly switched out the calcCoords() function for my own which uses cartesian coordinates. Except I get this, admittely funky looking, line drawing as of now.

Does anyone now how to get it right?
2. import processing.opengl.*;
3. import codeanticode.glgraphics.*;
4. import javax.media.opengl.*;
6. int globeDetail = 100;
7. float rotationX = 0.0f,
8. rotationY = 0.0f,
9. velocityX = 0.0f,
10. velocityY = 0.0f,
11. globeRadius = 450.0f,
12. distance = 20000.0f;
13. String globeMapName = "mars_6k_color.jpg";
14. PImage globeHeight;
15. ArrayList vertices = new ArrayList(),
16. texCoords = new ArrayList(),
17. normals = new ArrayList();
18. PFont font;
19. GLModel mars;
20. GLTexture tex;
22. public void setup() {
24. size(screen.width, screen.height, GLConstants.GLGRAPHICS);
25. hint(ENABLE_OPENGL_4X_SMOOTH);
27. font = loadFont("LucidaSansUnicode.vlw");
28. globeHeight = loadImage("mars_6k_topo.jpg");
30. setupSphere();
32. mars = new GLModel(this, vertices.size(), TRIANGLE_STRIP, GLModel.STATIC);
33. mars.updateVertices(vertices);
35. tex = new GLTexture(this, globeMapName);
36. mars.initTextures(1);
37. mars.setTexture(0, tex);
39. mars.updateTexCoords(0, texCoords);
41. mars.initNormals();
42. mars.updateNormals(normals);
44. mars.initColors();
45. mars.setColors(255);
46. mars.setShininess(100);
47. }
49. public void draw() {
51. background(0);
53. GLGraphics renderer = (GLGraphics)g;
54. renderer.beginGL();
56. renderer.gl.glEnable(GL.GL_LIGHTING);
57. renderer.gl.glEnable(GL.GL_LIGHT0);
58. renderer.gl.glMaterialfv(GL.GL_FRONT_AND_BACK, GL.GL_AMBIENT, new float[]{0.1,0.1,0.1,1}, 0);
59. renderer.gl.glMaterialfv(GL.GL_FRONT_AND_BACK, GL.GL_DIFFUSE, new float[]{0.9,0.9,0.9,1}, 0);
60. renderer.gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, new float[] {1000, -600, 400, 0 }, 0);
61. renderer.gl.glLightfv(GL.GL_LIGHT0, GL.GL_SPECULAR, new float[] { 1, 1, 1, 0.75 }, 1);
63. translate(width/2, height/2, 0);
65. pushMatrix();
66. rotateX(radians(rotationX));
67. rotateY(radians(270 - rotationY));
68. renderer.model(mars);
69. popMatrix();
71. renderer.endGL();
73. rotationX += velocityX;
74. rotationY += velocityY;
75. velocityX *= 0.95;
76. velocityY *= 0.95;
78. if (mousePressed) {
79. velocityX += -(mouseY-pmouseY) * 0.01;
80. velocityY -= (mouseX-pmouseX) * 0.01;
81. }
82. }
84. public void setupSphere(){
86. float[] grid = new float[globeDetail+1];
88. for(int i = 0; i <= globeDetail; i++){
89. grid[i]= i / (float) globeDetail;
90. }
92. for(int i = 0; i <= globeDetail; i++){
93. for(int j = 0; j <= globeDetail; j++){
94. calcPoint(grid[i], grid[j]);
95. }
96. }
97. }
100. void calcPoint(float x, float y){
102. float phi = x*2*PI;
103. float theta = PI - y*PI;
105. int nx = (int) map(x, 0, 1, 0, globeHeight.width);
106. int ny = (int) map(y, 0, 1, 0, globeHeight.height);
107. int index = nx+ny*globeHeight.width;
108. float h = 0;
110. try {
111. h = brightness(globeHeight.pixels[index])/10;
112. } catch(ArrayIndexOutOfBoundsException e) {}
114. float mx = (globeRadius+h)*sin(theta)*cos(phi);
115. float my = (globeRadius+h)*sin(theta)*sin(phi);
116. float mz = (globeRadius+h)*cos(theta);
118. addVertex(mx, my, mz, x, y);
119. }
121. void addVertex(float x, float y, float z, float u, float v) {
122. PVector vert = new PVector(x, y, z);
123. PVector texCoord = new PVector(u, v);
124. PVector vertNorm = PVector.div(vert, vert.mag());
125. vertices.add(vert);
126. texCoords.add(texCoord);
127. normals.add(vertNorm);
128. }

processing.core.PConstants in java.class? (eclipse)

[3 Replies]
- 12-Jan-2011 05:41 AM
- Forum: Programming Questions
Hi,

I just switched over from PDE to eclipse and I'm already running into my first problem, which is I'm ashamed to say, pretty basic (I guess?). For the life of me I can't seem to get PConstants to work?

Any of you care to help me out?

Example:
1. import processing.core.PApplet;
2. // No difference if I import processing.core.PConstants;
4. public class Image {
5. PApplet parent;
7. public Image(PApplet parent) {
8. this.parent = parent;
9. }
11. void render() {
12. parent.beginShape(QUAD_STRIP); // Does not work.
13. parent.vertex(100, 100);
14. parent.vertex(100, 200);
15. parent.vertex(200, 200);
16. parent.vertex(200, 100);
17. parent.endShape(2); // Works.
18. }
19. }

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