Examples with Quaternion com.jme3.math.Quaternion used on opensource projects

Example 36 with Quaternion

use of com.jme3.math.Quaternion in project jmonkeyengine by jMonkeyEngine.

the class TestChaseCamera method simpleInitApp.

public void simpleInitApp() {
    // Load a teapot model
    teaGeom = (Geometry) assetManager.loadModel("Models/Teapot/Teapot.obj");
    Material mat_tea = new Material(assetManager, "Common/MatDefs/Misc/ShowNormals.j3md");
    teaGeom.setMaterial(mat_tea);
    rootNode.attachChild(teaGeom);
    // Load a floor model
    Material mat_ground = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
    mat_ground.setTexture("ColorMap", assetManager.loadTexture("Interface/Logo/Monkey.jpg"));
    Geometry ground = new Geometry("ground", new Quad(50, 50));
    ground.setLocalRotation(new Quaternion().fromAngleAxis(-FastMath.HALF_PI, Vector3f.UNIT_X));
    ground.setLocalTranslation(-25, -1, 25);
    ground.setMaterial(mat_ground);
    rootNode.attachChild(ground);
    // Disable the default first-person cam!
    flyCam.setEnabled(false);
    // Enable a chase cam
    chaseCam = new ChaseCamera(cam, teaGeom, inputManager);
    //Uncomment this to invert the camera's vertical rotation Axis 
    //chaseCam.setInvertVerticalAxis(true);
    //Uncomment this to invert the camera's horizontal rotation Axis
    //chaseCam.setInvertHorizontalAxis(true);
    //Comment this to disable smooth camera motion
    chaseCam.setSmoothMotion(true);
    //Uncomment this to disable trailing of the camera 
    //WARNING, trailing only works with smooth motion enabled. It is true by default.
    //chaseCam.setTrailingEnabled(false);
    //Uncomment this to look 3 world units above the target
    //chaseCam.setLookAtOffset(Vector3f.UNIT_Y.mult(3));
    //Uncomment this to enable rotation when the middle mouse button is pressed (like Blender)
    //WARNING : setting this trigger disable the rotation on right and left mouse button click
    //chaseCam.setToggleRotationTrigger(new MouseButtonTrigger(MouseInput.BUTTON_MIDDLE));
    //Uncomment this to set mutiple triggers to enable rotation of the cam
    //Here spade bar and middle mouse button
    //chaseCam.setToggleRotationTrigger(new MouseButtonTrigger(MouseInput.BUTTON_MIDDLE),new KeyTrigger(KeyInput.KEY_SPACE));
    //registering inputs for target's movement
    registerInput();
}

Example 37 with Quaternion

use of com.jme3.math.Quaternion in project jmonkeyengine by jMonkeyEngine.

the class Spatial method rotate.

/**
     * 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;
}

Example 38 with Quaternion

use of com.jme3.math.Quaternion in project jmonkeyengine by jMonkeyEngine.

the class Spatial method lookAt.

/**
     * <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.
     *
     * 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();
}

Example 39 with Quaternion

use of com.jme3.math.Quaternion in project jmonkeyengine by jMonkeyEngine.

the class Spatial method rotateUpTo.

/**
     * <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();
}

Example 40 with Quaternion

use of com.jme3.math.Quaternion in project jmonkeyengine by jMonkeyEngine.

the class MultiPassLightingLogic method render.

@Override
public void render(RenderManager renderManager, Shader shader, Geometry geometry, LightList lights, int lastTexUnit) {
    Renderer r = renderManager.getRenderer();
    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;
    getAmbientColor(lights, false, ambientLightColor);
    for (int i = 0; i < lights.size(); i++) {
        Light l = lights.get(i);
        if (l instanceof AmbientLight) {
            continue;
        }
        if (isFirstLight) {
            // set ambient color for first light only
            ambientColor.setValue(VarType.Vector4, ambientLightColor);
            isFirstLight = false;
            isSecondLight = true;
        } else if (isSecondLight) {
            ambientColor.setValue(VarType.Vector4, ColorRGBA.Black);
            // apply additive blending for 2nd and future lights
            r.applyRenderState(ADDITIVE_LIGHT);
            isSecondLight = false;
        }
        TempVars vars = TempVars.get();
        Quaternion tmpLightDirection = vars.quat1;
        Quaternion tmpLightPosition = vars.quat2;
        ColorRGBA tmpLightColor = vars.color;
        Vector4f tmpVec = vars.vect4f1;
        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();
                //FIXME : there is an inconstency here due to backward
                //compatibility of the lighting shader.
                //The directional light direction is passed in the
                //LightPosition uniform. The lighting shader needs to be
                //reworked though in order to fix this.
                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 direction 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 happens now in the frag shader.
                tmpVec.set(dir2.getX(), dir2.getY(), dir2.getZ(), 0);
                renderManager.getCurrentCamera().getViewMatrix().mult(tmpVec, tmpVec);
                tmpLightDirection.set(tmpVec.getX(), tmpVec.getY(), tmpVec.getZ(), spotAngleCos);
                lightDir.setValue(VarType.Vector4, tmpLightDirection);
                break;
            case Probe:
                break;
            default:
                throw new UnsupportedOperationException("Unknown type of light: " + l.getType());
        }
        vars.release();
        r.setShader(shader);
        renderMeshFromGeometry(r, geometry);
    }
    if (isFirstLight) {
        // Either there are no lights at all, or only ambient lights.
        // Render a dummy "normal light" so we can see the ambient color.
        ambientColor.setValue(VarType.Vector4, getAmbientColor(lights, false, ambientLightColor));
        lightColor.setValue(VarType.Vector4, ColorRGBA.BlackNoAlpha);
        lightPos.setValue(VarType.Vector4, NULL_DIR_LIGHT);
        r.setShader(shader);
        renderMeshFromGeometry(r, geometry);
    }
}