/**
* <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();
}
public Vector3f reflect(Vector3f point, Vector3f store) {
if (store == null) store = new Vector3f();
float d = pseudoDistance(point);
store.set(normal).negateLocal().multLocal(d * 2f);
store.addLocal(point);
return store;
}
/**
* Centers the spatial in the origin of the world bound.
*
* @return The spatial on which this method is called, e.g <code>this</code>.
*/
public Spatial center() {
Vector3f worldTrans = getWorldTranslation();
Vector3f worldCenter = getWorldBound().getCenter();
Vector3f absTrans = worldTrans.subtract(worldCenter);
setLocalTranslation(absTrans);
return this;
}
@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;
}
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);
}
/**
* Changes the values of this matrix acording to it's parent. Very similar to the concept of
* Node/Spatial transforms.
*
* @param parent The parent matrix.
* @return This matrix, after combining.
*/
public Transform combineWithParent(Transform parent) {
scale.multLocal(parent.scale);
// rot.multLocal(parent.rot);
parent.rot.mult(rot, rot);
// This here, is evil code
// parent
// .rot
// .multLocal(translation)
// .multLocal(parent.scale)
// .addLocal(parent.translation);
translation.multLocal(parent.scale);
parent.rot.multLocal(translation).addLocal(parent.translation);
return this;
}
/**
* <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 Plane clone() {
try {
Plane p = (Plane) super.clone();
p.normal = normal.clone();
return p;
} catch (CloneNotSupportedException e) {
throw new AssertionError();
}
}
/**
* Uploads the lights in the light list as two uniform arrays.<br>
* <br>
* *
*
* <p><code>uniform vec4 g_LightColor[numLights];</code><br>
* // g_LightColor.rgb is the diffuse/specular color of the light.<br>
* // g_Lightcolor.a is the type of light, 0 = Directional, 1 = Point, <br>
* // 2 = Spot. <br>
* <br>
* <code>uniform vec4 g_LightPosition[numLights];</code><br>
* // g_LightPosition.xyz is the position of the light (for point lights)<br>
* // or the direction of the light (for directional lights).<br>
* // g_LightPosition.w is the inverse radius (1/r) of the light (for attenuation) <br>
*/
protected void updateLightListUniforms(Shader shader, Geometry g, int numLights) {
if (numLights == 0) { // this shader does not do lighting, ignore.
return;
}
LightList lightList = g.getWorldLightList();
Uniform lightColor = shader.getUniform("g_LightColor");
Uniform lightPos = shader.getUniform("g_LightPosition");
Uniform lightDir = shader.getUniform("g_LightDirection");
lightColor.setVector4Length(numLights);
lightPos.setVector4Length(numLights);
lightDir.setVector4Length(numLights);
Uniform ambientColor = shader.getUniform("g_AmbientLightColor");
ambientColor.setValue(VarType.Vector4, getAmbientColor(lightList));
int lightIndex = 0;
for (int i = 0; i < numLights; i++) {
if (lightList.size() <= i) {
lightColor.setVector4InArray(0f, 0f, 0f, 0f, lightIndex);
lightPos.setVector4InArray(0f, 0f, 0f, 0f, lightIndex);
} else {
Light l = lightList.get(i);
ColorRGBA color = l.getColor();
lightColor.setVector4InArray(
color.getRed(), color.getGreen(), color.getBlue(), l.getType().getId(), i);
switch (l.getType()) {
case Directional:
DirectionalLight dl = (DirectionalLight) l;
Vector3f dir = dl.getDirection();
lightPos.setVector4InArray(dir.getX(), dir.getY(), dir.getZ(), -1, lightIndex);
break;
case Point:
PointLight pl = (PointLight) l;
Vector3f pos = pl.getPosition();
float invRadius = pl.getInvRadius();
lightPos.setVector4InArray(pos.getX(), pos.getY(), pos.getZ(), invRadius, lightIndex);
break;
case Spot:
SpotLight sl = (SpotLight) l;
Vector3f pos2 = sl.getPosition();
Vector3f dir2 = sl.getDirection();
float invRange = sl.getInvSpotRange();
float spotAngleCos = sl.getPackedAngleCos();
lightPos.setVector4InArray(pos2.getX(), pos2.getY(), pos2.getZ(), invRange, lightIndex);
lightDir.setVector4InArray(
dir2.getX(), dir2.getY(), dir2.getZ(), spotAngleCos, lightIndex);
break;
case Ambient:
// skip this light. Does not increase lightIndex
continue;
default:
throw new UnsupportedOperationException("Unknown type of light: " + l.getType());
}
}
lightIndex++;
}
while (lightIndex < numLights) {
lightColor.setVector4InArray(0f, 0f, 0f, 0f, lightIndex);
lightPos.setVector4InArray(0f, 0f, 0f, 0f, lightIndex);
lightIndex++;
}
}
public Vector3f getClosestPoint(Vector3f point, Vector3f store) {
// float t = constant - normal.dot(point);
// return store.set(normal).multLocal(t).addLocal(point);
float t = (constant - normal.dot(point)) / normal.dot(normal);
return store.set(normal).multLocal(t).addLocal(point);
}
/** 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);
}
/**
* Sets this matrix's scale to the given x,y,z values.
*
* @param x This matrix's new x scale.
* @param y This matrix's new y scale.
* @param z This matrix's new z scale.
* @return this
*/
public Transform setScale(float x, float y, float z) {
scale.set(x, y, z);
return this;
}
/**
* <code>pseudoDistance</code> calculates the distance from this plane to a provided point. If the
* point is on the negative side of the plane the distance returned is negative, otherwise it is
* positive. If the point is on the plane, it is zero.
*
* @param point the point to check.
* @return the signed distance from the plane to a point.
*/
public float pseudoDistance(Vector3f point) {
return normal.dot(point) - constant;
}
/**
* Sets this matrix's translation to the given x,y,z values.
*
* @param x This matrix's new x translation.
* @param y This matrix's new y translation.
* @param z This matrix's new z translation.
* @return this
*/
public Transform setTranslation(float x, float y, float z) {
translation.set(x, y, z);
return this;
}
/**
* Initialize the Plane using the given 3 points as coplanar.
*
* @param v1 the first point
* @param v2 the second point
* @param v3 the third point
*/
public void setPlanePoints(Vector3f v1, Vector3f v2, Vector3f v3) {
normal.set(v2).subtractLocal(v1);
normal.crossLocal(v3.x - v1.x, v3.y - v1.y, v3.z - v1.z).normalizeLocal();
constant = normal.dot(v1);
}
/**
* Stores this scale value into the given vector3f. If scale is null, a new vector3f is created to
* hold the value. The value, once stored, is returned.
*
* @param scale The store location for this matrix's scale.
* @return The value of this matrix's scale.
*/
public Vector3f getScale(Vector3f scale) {
if (scale == null) scale = new Vector3f();
scale.set(this.scale);
return scale;
}
/**
* Stores this translation value into the given vector3f. If trans is null, a new vector3f is
* created to hold the value. The value, once stored, is returned.
*
* @param trans The store location for this matrix's translation.
* @return The value of this matrix's translation.
*/
public Vector3f getTranslation(Vector3f trans) {
if (trans == null) trans = new Vector3f();
trans.set(this.translation);
return trans;
}
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);
}
}