@Override
public void simpleUpdate(float tpf) {
time += tpf;
int random = rand.nextInt(2000);
float mult1 = 1.0f;
float mult2 = 1.0f;
if (random < 500) {
mult1 = 1.0f;
mult2 = 1.0f;
} else if (random < 1000) {
mult1 = -1.0f;
mult2 = 1.0f;
} else if (random < 1500) {
mult1 = 1.0f;
mult2 = -1.0f;
} else if (random <= 2000) {
mult1 = -1.0f;
mult2 = -1.0f;
}
box = batchNode.getChild("Box" + random);
if (box != null) {
Vector3f v = box.getLocalTranslation();
box.setLocalTranslation(
v.x + FastMath.sin(time * mult1) * 20,
v.y + (FastMath.sin(time * mult1) * FastMath.cos(time * mult1) * 20),
v.z + FastMath.cos(time * mult2) * 20);
}
terrain.setLocalRotation(new Quaternion().fromAngleAxis(time, Vector3f.UNIT_Y));
}
public void generateRandomAsteroid() {
Material asteroidMaterial = new Material(assetManager, "Common/MatDefs/Light/Lighting.j3md");
asteroidMaterial.setTexture(
"DiffuseMap", assetManager.loadTexture("Textures/Asteroid/Solid.png"));
asteroidMaterial.setTexture(
"NormalMap", assetManager.loadTexture("Textures/Asteroid/Normal.png"));
Asteroid asteroid =
new Asteroid("Asteroid", assetManager.loadModel("Models/Asteroid.j3o"), asteroidMaterial);
asteroid.getModel().scale((float) Math.random() / 2);
if (Math.random() * noComet < 0.05) {
asteroid.getModel().scale((float) Math.random() / 2);
asteroid.addTrail(
new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md"),
assetManager.loadTexture("Effects/Explosion/flame.png"));
asteroid.setSpeed((int) (Math.random() * 4) + 10);
noComet = 1;
} else {
asteroid.setSpeed((int) (Math.random() * 4) + 4);
noComet -= 0.05;
}
rootNode.attachChild(asteroid);
float theta = (float) (2 * FastMath.PI * Math.random());
float phi = (float) (2 * FastMath.PI * Math.random());
float r = 120;
float x = r * FastMath.cos(theta) * FastMath.sin(phi);
float y = r * FastMath.sin(theta) * FastMath.cos(phi);
float z = r * FastMath.cos(phi);
asteroid.setLocalTranslation(x, y, z);
asteroid.setDirection(
planets[2]
.getGeom()
.getWorldTranslation()
.subtract(asteroid.getLocalTranslation())
.normalize());
asteroid.setRotation(
new Vector3f((float) Math.random(), (float) Math.random(), (float) Math.random())
.normalize());
asteroid.registerPhysics(bap.getPhysicsSpace());
asteroids.attachChild(asteroid);
}
@Override
protected void controlUpdate(float tpf) {
light.setPosition(spatial.getWorldTranslation().add(0, 0, 32));
flicker += 8 * tpf;
float radius =
FastMath.sin(FastMath.tan(FastMath.cos(flicker + (FastMath.rand.nextFloat() * 2)))) * 20
+ 200;
light.setRadius(radius);
}
/**
* Rebuilds the cylinder based on a new set of parameters.
*
* @param axisSamples the number of samples along the axis.
* @param radialSamples the number of samples around the radial.
* @param radius the radius of the bottom of the cylinder.
* @param radius2 the radius of the top of the cylinder.
* @param height the cylinder's height.
* @param closed should the cylinder have top and bottom surfaces.
* @param inverted is the cylinder is meant to be viewed from the inside.
*/
public void updateGeometry(
int axisSamples,
int radialSamples,
float radius,
float radius2,
float height,
boolean closed,
boolean inverted) {
this.axisSamples = axisSamples + (closed ? 2 : 0);
this.radialSamples = radialSamples;
this.radius = radius;
this.radius2 = radius2;
this.height = height;
this.closed = closed;
this.inverted = inverted;
// VertexBuffer pvb = getBuffer(Type.Position);
// VertexBuffer nvb = getBuffer(Type.Normal);
// VertexBuffer tvb = getBuffer(Type.TexCoord);
// Vertices
int vertCount = axisSamples * (radialSamples + 1) + (closed ? 2 : 0);
setBuffer(Type.Position, 3, createVector3Buffer(getFloatBuffer(Type.Position), vertCount));
// Normals
setBuffer(Type.Normal, 3, createVector3Buffer(getFloatBuffer(Type.Normal), vertCount));
// Texture co-ordinates
setBuffer(Type.TexCoord, 2, createVector2Buffer(vertCount));
int triCount = ((closed ? 2 : 0) + 2 * (axisSamples - 1)) * radialSamples;
setBuffer(Type.Index, 3, createShortBuffer(getShortBuffer(Type.Index), 3 * triCount));
// generate geometry
float inverseRadial = 1.0f / radialSamples;
float inverseAxisLess = 1.0f / (closed ? axisSamples - 3 : axisSamples - 1);
float inverseAxisLessTexture = 1.0f / (axisSamples - 1);
float halfHeight = 0.5f * height;
// Generate points on the unit circle to be used in computing the mesh
// points on a cylinder slice.
float[] sin = new float[radialSamples + 1];
float[] cos = new float[radialSamples + 1];
for (int radialCount = 0; radialCount < radialSamples; radialCount++) {
float angle = FastMath.TWO_PI * inverseRadial * radialCount;
cos[radialCount] = FastMath.cos(angle);
sin[radialCount] = FastMath.sin(angle);
}
sin[radialSamples] = sin[0];
cos[radialSamples] = cos[0];
// calculate normals
Vector3f[] vNormals = null;
Vector3f vNormal = Vector3f.UNIT_Z;
if ((height != 0.0f) && (radius != radius2)) {
vNormals = new Vector3f[radialSamples];
Vector3f vHeight = Vector3f.UNIT_Z.mult(height);
Vector3f vRadial = new Vector3f();
for (int radialCount = 0; radialCount < radialSamples; radialCount++) {
vRadial.set(cos[radialCount], sin[radialCount], 0.0f);
Vector3f vRadius = vRadial.mult(radius);
Vector3f vRadius2 = vRadial.mult(radius2);
Vector3f vMantle = vHeight.subtract(vRadius2.subtract(vRadius));
Vector3f vTangent = vRadial.cross(Vector3f.UNIT_Z);
vNormals[radialCount] = vMantle.cross(vTangent).normalize();
}
}
FloatBuffer nb = getFloatBuffer(Type.Normal);
FloatBuffer pb = getFloatBuffer(Type.Position);
FloatBuffer tb = getFloatBuffer(Type.TexCoord);
// generate the cylinder itself
Vector3f tempNormal = new Vector3f();
for (int axisCount = 0, i = 0; axisCount < axisSamples; axisCount++, i++) {
float axisFraction;
float axisFractionTexture;
int topBottom = 0;
if (!closed) {
axisFraction = axisCount * inverseAxisLess; // in [0,1]
axisFractionTexture = axisFraction;
} else {
if (axisCount == 0) {
topBottom = -1; // bottom
axisFraction = 0;
axisFractionTexture = inverseAxisLessTexture;
} else if (axisCount == axisSamples - 1) {
topBottom = 1; // top
axisFraction = 1;
axisFractionTexture = 1 - inverseAxisLessTexture;
} else {
axisFraction = (axisCount - 1) * inverseAxisLess;
axisFractionTexture = axisCount * inverseAxisLessTexture;
}
}
// compute center of slice
float z = -halfHeight + height * axisFraction;
Vector3f sliceCenter = new Vector3f(0, 0, z);
// compute slice vertices with duplication at end point
int save = i;
for (int radialCount = 0; radialCount < radialSamples; radialCount++, i++) {
float radialFraction = radialCount * inverseRadial; // in [0,1)
tempNormal.set(cos[radialCount], sin[radialCount], 0.0f);
if (vNormals != null) {
vNormal = vNormals[radialCount];
} else if (radius == radius2) {
vNormal = tempNormal;
}
if (topBottom == 0) {
if (!inverted) nb.put(vNormal.x).put(vNormal.y).put(vNormal.z);
else nb.put(-vNormal.x).put(-vNormal.y).put(-vNormal.z);
} else {
nb.put(0).put(0).put(topBottom * (inverted ? -1 : 1));
}
tempNormal.multLocal((radius - radius2) * axisFraction + radius2).addLocal(sliceCenter);
pb.put(tempNormal.x).put(tempNormal.y).put(tempNormal.z);
tb.put((inverted ? 1 - radialFraction : radialFraction)).put(axisFractionTexture);
}
BufferUtils.copyInternalVector3(pb, save, i);
BufferUtils.copyInternalVector3(nb, save, i);
tb.put((inverted ? 0.0f : 1.0f)).put(axisFractionTexture);
}
if (closed) {
pb.put(0).put(0).put(-halfHeight); // bottom center
nb.put(0).put(0).put(-1 * (inverted ? -1 : 1));
tb.put(0.5f).put(0);
pb.put(0).put(0).put(halfHeight); // top center
nb.put(0).put(0).put(1 * (inverted ? -1 : 1));
tb.put(0.5f).put(1);
}
IndexBuffer ib = getIndexBuffer();
int index = 0;
// Connectivity
for (int axisCount = 0, axisStart = 0; axisCount < axisSamples - 1; axisCount++) {
int i0 = axisStart;
int i1 = i0 + 1;
axisStart += radialSamples + 1;
int i2 = axisStart;
int i3 = i2 + 1;
for (int i = 0; i < radialSamples; i++) {
if (closed && axisCount == 0) {
if (!inverted) {
ib.put(index++, i0++);
ib.put(index++, vertCount - 2);
ib.put(index++, i1++);
} else {
ib.put(index++, i0++);
ib.put(index++, i1++);
ib.put(index++, vertCount - 2);
}
} else if (closed && axisCount == axisSamples - 2) {
ib.put(index++, i2++);
ib.put(index++, inverted ? vertCount - 1 : i3++);
ib.put(index++, inverted ? i3++ : vertCount - 1);
} else {
ib.put(index++, i0++);
ib.put(index++, inverted ? i2 : i1);
ib.put(index++, inverted ? i1 : i2);
ib.put(index++, i1++);
ib.put(index++, inverted ? i2++ : i3++);
ib.put(index++, inverted ? i3++ : i2++);
}
}
}
updateBound();
}
public static Vector3f getVectorFromAngle(float angle) {
return new Vector3f(FastMath.cos(angle), FastMath.sin(angle), 0);
}
