Android Open Source - jmini3d Sprite Geometry

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Back to project page jmini3d.

License

The source code is released under:

Copyright 2012 Mobialia http://www.mobialia.com/ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to ...

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Java Source Code

package jmini3d.geometry;
/*from  w  ww. j  a v  a 2s .  c o m*/
import jmini3d.GpuObjectStatus;

public class SpriteGeometry extends Geometry {
  float[] vertex;
  float[] uvs;
  short[] faces;

  int vertexPointer = 0;
  int facePointer = 0;

  public SpriteGeometry(int spriteCount) {
    vertex = new float[3 * 4 * spriteCount];
    uvs = new float[2 * 4 * spriteCount];
    faces = new short[3 * 2 * spriteCount];
  }

  public short addVertex(float x, float y, float z, float u, float v) {
    vertex[vertexPointer * 3] = x;
    vertex[vertexPointer * 3 + 1] = y;
    vertex[vertexPointer * 3 + 2] = z;

    uvs[vertexPointer * 2] = u;
    uvs[vertexPointer * 2 + 1] = v;

    vertexPointer++;
    return (short) (vertexPointer - 1);
  }

  public void addFace(short a, short b, short c) {
    faces[facePointer * 3] = a;
    faces[facePointer * 3 + 1] = b;
    faces[facePointer * 3 + 2] = c;

    facePointer++;
  }

  public void addSprite(float x1, float y1, float x2, float y2) {
    addSprite(x1, y1, x2, y2, 0, 0, 1, 1);
  }

  public void addSprite(float x1, float y1, float x2, float y2, float uvx1, float uvy1, float uvx2, float uvy2) {
    short _leftBack = addVertex(x1, y1, 0, uvx1, uvy1);
    short _rightBack = addVertex(x2, y1, 0, uvx2, uvy1);
    short _leftFront = addVertex(x1, y2, 0, uvx1, uvy2);
    short _rightFront = addVertex(x2, y2, 0, uvx2, uvy2);

    addFace(_leftBack, _leftFront, _rightBack);
    addFace(_rightBack, _leftFront, _rightFront);
  }

  public void setSpritePosition(int index, float x1, float y1, float x2, float y2) {
    vertex[index * 12] = x1;
    vertex[(index * 12) + 1] = y1;
    vertex[(index * 12) + 3] = x2;
    vertex[(index * 12) + 4] = y1;
    vertex[(index * 12) + 6] = x1;
    vertex[(index * 12) + 7] = y2;
    vertex[(index * 12) + 9] = x2;
    vertex[(index * 12) + 10] = y2;

    status &= ~GpuObjectStatus.VERTICES_UPLOADED;
  }

  public void setUv(int index, float u, float v) {
    uvs[index << 1] = u;
    uvs[(index << 1) + 1] = v;

    status &= ~GpuObjectStatus.UVS_UPLOADED;
  }

  public float[] vertex() {
    return vertex;
  }

  public float[] normals() {
    return null;
  }

  public float[] uvs() {
    return uvs;
  }

  public short[] faces() {
    return faces;
  }
}

Java Source Code List