/**
* <code>rotateUpTo</code> is a utility function that alters the local rotation to point the Y
* axis in the direction given by newUp.
*
* @param newUp the up vector to use - assumed to be a unit vector.
*/
public void rotateUpTo(Vector3f newUp) {
TempVars vars = TempVars.get();
Vector3f compVecA = vars.vect1;
Quaternion q = vars.quat1;
// First figure out the current up vector.
Vector3f upY = compVecA.set(Vector3f.UNIT_Y);
Quaternion rot = localTransform.getRotation();
rot.multLocal(upY);
// get angle between vectors
float angle = upY.angleBetween(newUp);
// figure out rotation axis by taking cross product
Vector3f rotAxis = upY.crossLocal(newUp).normalizeLocal();
// Build a rotation quat and apply current local rotation.
q.fromAngleNormalAxis(angle, rotAxis);
q.mult(rot, rot);
vars.release();
setTransformRefresh();
}
/**
* Rotates the spatial by the xAngle, yAngle and zAngle angles (in radians), (aka pitch, yaw,
* roll) in the local coordinate space.
*
* @return The spatial on which this method is called, e.g <code>this</code>.
*/
public Spatial rotate(float xAngle, float yAngle, float zAngle) {
TempVars vars = TempVars.get();
Quaternion q = vars.quat1;
q.fromAngles(xAngle, yAngle, zAngle);
rotate(q);
vars.release();
return this;
}
public Vector3f transformVector(final Vector3f in, Vector3f store) {
if (store == null) store = new Vector3f();
// multiply with scale first, then rotate, finally translate (cf.
// Eberly)
return rot.mult(store.set(in).multLocal(scale), store).addLocal(translation);
}
/**
* <code>lookAt</code> is a convenience method for auto-setting the local rotation based on a
* position in world space and an up vector. It computes the rotation to transform the z-axis to
* point onto 'position' and the y-axis to 'up'. Unlike {@link
* Quaternion#lookAt(com.jme3.math.Vector3f, com.jme3.math.Vector3f) } this method takes a world
* position to look at and not a relative direction.
*
* <p>Note : 28/01/2013 this method has been fixed as it was not taking into account the parent
* rotation. This was resulting in improper rotation when the spatial had rotated parent nodes.
* This method is intended to work in world space, so no matter what parent graph the spatial has,
* it will look at the given position in world space.
*
* @param position where to look at in terms of world coordinates
* @param upVector a vector indicating the (local) up direction. (typically {0, 1, 0} in jME.)
*/
public void lookAt(Vector3f position, Vector3f upVector) {
Vector3f worldTranslation = getWorldTranslation();
TempVars vars = TempVars.get();
Vector3f compVecA = vars.vect4;
compVecA.set(position).subtractLocal(worldTranslation);
getLocalRotation().lookAt(compVecA, upVector);
if (getParent() != null) {
Quaternion rot = vars.quat1;
rot = rot.set(parent.getWorldRotation()).inverseLocal().multLocal(getLocalRotation());
rot.normalizeLocal();
setLocalRotation(rot);
}
vars.release();
setTransformRefresh();
}
@Override
public Transform clone() {
try {
Transform tq = (Transform) super.clone();
tq.rot = rot.clone();
tq.scale = scale.clone();
tq.translation = translation.clone();
return tq;
} catch (CloneNotSupportedException e) {
throw new AssertionError();
}
}
public Vector3f transformInverseVector(final Vector3f in, Vector3f store) {
if (store == null) store = new Vector3f();
// The author of this code should look above and take the inverse of that
// But for some reason, they didnt ..
// in.subtract(translation, store).divideLocal(scale);
// rot.inverse().mult(store, store);
in.subtract(translation, store);
rot.inverse().mult(store, store);
store.divideLocal(scale);
return store;
}
/** Loads the identity. Equal to translation=0,0,0 scale=1,1,1 rot=0,0,0,1. */
public void loadIdentity() {
translation.set(0, 0, 0);
scale.set(1, 1, 1);
rot.set(0, 0, 0, 1);
}
/**
* Stores this rotation value into the given Quaternion. If quat is null, a new Quaternion is
* created to hold the value. The value, once stored, is returned.
*
* @param quat The store location for this matrix's rotation.
* @return The value of this matrix's rotation.
*/
public Quaternion getRotation(Quaternion quat) {
if (quat == null) quat = new Quaternion();
quat.set(rot);
return quat;
}
protected void renderMultipassLighting(Shader shader, Geometry g, RenderManager rm) {
Renderer r = rm.getRenderer();
LightList lightList = g.getWorldLightList();
Uniform lightDir = shader.getUniform("g_LightDirection");
Uniform lightColor = shader.getUniform("g_LightColor");
Uniform lightPos = shader.getUniform("g_LightPosition");
Uniform ambientColor = shader.getUniform("g_AmbientLightColor");
boolean isFirstLight = true;
boolean isSecondLight = false;
for (int i = 0; i < lightList.size(); i++) {
Light l = lightList.get(i);
if (l instanceof AmbientLight) {
continue;
}
if (isFirstLight) {
// set ambient color for first light only
ambientColor.setValue(VarType.Vector4, getAmbientColor(lightList));
isFirstLight = false;
isSecondLight = true;
} else if (isSecondLight) {
ambientColor.setValue(VarType.Vector4, ColorRGBA.Black);
// apply additive blending for 2nd and future lights
r.applyRenderState(additiveLight);
isSecondLight = false;
}
TempVars vars = TempVars.get();
Quaternion tmpLightDirection = vars.quat1;
Quaternion tmpLightPosition = vars.quat2;
ColorRGBA tmpLightColor = vars.color;
Vector4f tmpVec = vars.vect4f;
ColorRGBA color = l.getColor();
tmpLightColor.set(color);
tmpLightColor.a = l.getType().getId();
lightColor.setValue(VarType.Vector4, tmpLightColor);
switch (l.getType()) {
case Directional:
DirectionalLight dl = (DirectionalLight) l;
Vector3f dir = dl.getDirection();
tmpLightPosition.set(dir.getX(), dir.getY(), dir.getZ(), -1);
lightPos.setValue(VarType.Vector4, tmpLightPosition);
tmpLightDirection.set(0, 0, 0, 0);
lightDir.setValue(VarType.Vector4, tmpLightDirection);
break;
case Point:
PointLight pl = (PointLight) l;
Vector3f pos = pl.getPosition();
float invRadius = pl.getInvRadius();
tmpLightPosition.set(pos.getX(), pos.getY(), pos.getZ(), invRadius);
lightPos.setValue(VarType.Vector4, tmpLightPosition);
tmpLightDirection.set(0, 0, 0, 0);
lightDir.setValue(VarType.Vector4, tmpLightDirection);
break;
case Spot:
SpotLight sl = (SpotLight) l;
Vector3f pos2 = sl.getPosition();
Vector3f dir2 = sl.getDirection();
float invRange = sl.getInvSpotRange();
float spotAngleCos = sl.getPackedAngleCos();
tmpLightPosition.set(pos2.getX(), pos2.getY(), pos2.getZ(), invRange);
lightPos.setValue(VarType.Vector4, tmpLightPosition);
// We transform the spot directoin in view space here to save 5 varying later in the
// lighting shader
// one vec4 less and a vec4 that becomes a vec3
// the downside is that spotAngleCos decoding happen now in the frag shader.
tmpVec.set(dir2.getX(), dir2.getY(), dir2.getZ(), 0);
rm.getCurrentCamera().getViewMatrix().mult(tmpVec, tmpVec);
tmpLightDirection.set(tmpVec.getX(), tmpVec.getY(), tmpVec.getZ(), spotAngleCos);
lightDir.setValue(VarType.Vector4, tmpLightDirection);
break;
default:
throw new UnsupportedOperationException("Unknown type of light: " + l.getType());
}
vars.release();
r.setShader(shader);
r.renderMesh(g.getMesh(), g.getLodLevel(), 1);
}
if (isFirstLight && lightList.size() > 0) {
// There are only ambient lights in the scene. Render
// a dummy "normal light" so we can see the ambient
ambientColor.setValue(VarType.Vector4, getAmbientColor(lightList));
lightColor.setValue(VarType.Vector4, ColorRGBA.BlackNoAlpha);
lightPos.setValue(VarType.Vector4, nullDirLight);
r.setShader(shader);
r.renderMesh(g.getMesh(), g.getLodLevel(), 1);
}
}
