public void initScene() {
SimpleMaterial material = new SimpleMaterial();
material.setUseSingleColor(true);
// -- "curve1" will be the original curve. Note that we create two curves for
// demonstration purposes only. You'd typically create one curve and then
// reparametrize it.
CatmullRomCurve3D curve1 = new CatmullRomCurve3D();
CatmullRomCurve3D curve2 = new CatmullRomCurve3D();
for (int i = 0; i < 16; i++) {
// -- generate a random point within certain limits
Vector3 pos = new Vector3(-1 + (Math.random() * 2), -1.2f + (Math.random() * 2.4f), 0);
curve1.addPoint(pos);
curve2.addPoint(pos);
// -- add a wireframe cube so we can see what the original
// points were
Cube s = new Cube(.06f);
s.setMaterial(material);
s.setColor(CURVE1_COLOR);
s.setPosition(pos);
s.setDrawingMode(GLES20.GL_LINES);
addChild(s);
}
// -- draw the first curve
drawCurve(curve1, CURVE1_COLOR, new Vector3());
BaseObject3D pathFollowObject = new Sphere(.04f, 16, 16);
pathFollowObject.setColor(CURVE1_COLOR);
pathFollowObject.setMaterial(material);
addChild(pathFollowObject);
// -- animate a sphere that follow the first curve.
// This shows the non constant speed of a non parametrized curve.
TranslateAnimation3D anim = new TranslateAnimation3D(curve1);
anim.setDuration(ANIMATION_DURATION);
anim.setTransformable3D(pathFollowObject);
anim.setRepeatMode(RepeatMode.REVERSE_INFINITE);
registerAnimation(anim);
anim.play();
// -- reparametrize the curve for uniform distribution
curve2.reparametrizeForUniformDistribution(curve2.getPoints().size() * 4);
List<Vector3> points = curve2.getPoints();
// -- put spheres on the curve where the new points are
for (int i = 0; i < points.size(); i++) {
Vector3 pos = points.get(i);
Sphere s = new Sphere(.02f, 4, 4);
s.setMaterial(material);
s.setColor(CURVE2_COLOR);
s.setPosition(pos);
addChild(s);
}
// -- draw the second, reparametrized, curve
drawCurve(curve2, CURVE2_COLOR, new Vector3());
pathFollowObject = new Sphere(.04f, 16, 16);
pathFollowObject.setColor(CURVE2_COLOR);
pathFollowObject.setMaterial(material);
addChild(pathFollowObject);
// -- animate a sphere on the second curve.
// This shows a more or less constant speed of a parametrized curve.
anim = new TranslateAnimation3D(curve2);
anim.setDuration(ANIMATION_DURATION);
anim.setTransformable3D(pathFollowObject);
anim.setRepeatMode(RepeatMode.REVERSE_INFINITE);
registerAnimation(anim);
anim.play();
}
public void initScene() {
//
// -- Pack all textures in the "assets/atlas" folder into an 1024x1024 atlas
// -- this should be used to simplify implementation of multiple textures
// -- and to reduce texture binding calls to the GPU for increased performance
//
mAtlas = new TexturePacker(mContext).packTexturesFromAssets(1024, 1024, 0, false, "atlas");
mAtlasMaterial = new Material();
mSphereMaterial = new Material();
mCubeMaterial = new Material();
mPlaneMaterial = new Material();
try {
//
// -- Add the entire atlas to a material so it can be shown in the example
// -- this is not necessary in typical use cases
//
mAtlasMaterial.addTexture(new Texture("atlasTexture", mAtlas.getPages()[0]));
mAtlasMaterial.setColorInfluence(0);
//
// -- Add each target texture to the material
// -- they are pulled from the atlas by their original resource name
//
mSphereMaterial.addTexture(new Texture("earthtruecolor_nasa_big", mAtlas));
mSphereMaterial.setColorInfluence(0);
mCubeMaterial.addTexture(new Texture("camden_town_alpha", mAtlas));
mCubeMaterial.setColorInfluence(0);
mPlaneMaterial.addTexture(new Texture("rajawali", mAtlas));
mPlaneMaterial.setColorInfluence(0);
} catch (TextureException e) {
e.printStackTrace();
}
//
// -- Show the full atlas for demonstration purposes
//
mAtlasPlane = new Plane(Axis.Z);
mAtlasPlane.setMaterial(mAtlasMaterial);
mAtlasPlane.setY(1);
addChild(mAtlasPlane);
mTileSphere = new Sphere(.35f, 20, 20);
mTileSphere.setMaterial(mAtlasMaterial);
//
// -- The method 'setAtlasTile' is used to scale the UVs of the target object
// -- so that the appropriate image within the atlas is displayed
//
mTileSphere.setAtlasTile("earthtruecolor_nasa_big", mAtlas);
mTileSphere.setPosition(0, -.1f, 0);
addChild(mTileSphere);
mTileCube = new Cube(.5f);
mTileCube.setMaterial(mAtlasMaterial);
mTileCube.setAtlasTile("camden_town_alpha", mAtlas);
mTileCube.setPosition(-.5f, -1f, 0);
mTileCube.setRotX(-1);
addChild(mTileCube);
mTilePlane = new Plane(.6f, .6f, 1, 1);
mTilePlane.setMaterial(mAtlasMaterial);
mTilePlane.setAtlasTile("rajawali", mAtlas);
mTilePlane.setPosition(.5f, -1f, 0);
addChild(mTilePlane);
}