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Diffstat (limited to 'src/gleem/ExaminerViewer.java')
| -rw-r--r-- | src/gleem/ExaminerViewer.java | 620 |
1 files changed, 0 insertions, 620 deletions
diff --git a/src/gleem/ExaminerViewer.java b/src/gleem/ExaminerViewer.java deleted file mode 100644 index a7f3d64..0000000 --- a/src/gleem/ExaminerViewer.java +++ /dev/null @@ -1,620 +0,0 @@ -/* - * gleem -- OpenGL Extremely Easy-To-Use Manipulators. - * Copyright (C) 1998-2003 Kenneth B. Russell ([email protected]) - * - * Copying, distribution and use of this software in source and binary - * forms, with or without modification, is permitted provided that the - * following conditions are met: - * - * Distributions of source code must reproduce the copyright notice, - * this list of conditions and the following disclaimer in the source - * code header files; and Distributions of binary code must reproduce - * the copyright notice, this list of conditions and the following - * disclaimer in the documentation, Read me file, license file and/or - * other materials provided with the software distribution. - * - * The names of Sun Microsystems, Inc. ("Sun") and/or the copyright - * holder may not be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED "AS IS," WITHOUT A WARRANTY OF ANY - * KIND. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND - * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE, NON-INTERFERENCE, ACCURACY OF - * INFORMATIONAL CONTENT OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. THE - * COPYRIGHT HOLDER, SUN AND SUN'S LICENSORS SHALL NOT BE LIABLE FOR - * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR - * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL THE - * COPYRIGHT HOLDER, SUN OR SUN'S LICENSORS BE LIABLE FOR ANY LOST - * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, - * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND - * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR - * INABILITY TO USE THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY - * OF SUCH DAMAGES. YOU ACKNOWLEDGE THAT THIS SOFTWARE IS NOT - * DESIGNED, LICENSED OR INTENDED FOR USE IN THE DESIGN, CONSTRUCTION, - * OPERATION OR MAINTENANCE OF ANY NUCLEAR FACILITY. THE COPYRIGHT - * HOLDER, SUN AND SUN'S LICENSORS DISCLAIM ANY EXPRESS OR IMPLIED - * WARRANTY OF FITNESS FOR SUCH USES. - */ - -package gleem; - -import java.awt.Dimension; -import java.awt.event.*; -import java.util.*; - -import gleem.linalg.*; -import javax.media.opengl.*; - -/** <P> This is an application-level class, not part of the - manipulator hierarchy. It is an example of how you might integrate - gleem with another application which uses the mouse. </P> - - <P> For the given GLAutoDrawable, the ExaminerViewer takes over the - setting of the view position. It passes along mouse events it is - not interested in to the ManipManager's mouse routines. </P> - - <P> The ExaminerViewer's controls are similar to those of Open - Inventor's Examiner Viewer. Alt + Left mouse button causes - rotation about the focal point. Alt + Right mouse button causes - translation parallel to the image plane. Alt + both mouse buttons, - combined with up/down mouse motion, causes zooming out and in - along the view vector. (On platforms with a "Meta" key, that key - can be substituted in place of the Alt key.) The method - <code>setNoAltKeyMode</code> can be used to cause the - ExaminerViewer to take control of all mouse interactions in the - window, avoiding the need to hold down the Alt key. </P> - - <P>NOTE: the current ExaminerViewer implementation assumes a - minimum of two mouse buttons. For the Mac OS, the code needs to be - adjusted to use e.g., the Control key as the "right" mouse - button. </P> */ - -public class ExaminerViewer { - private GLAutoDrawable window; - /** Simple state machine for figuring out whether we are grabbing - events */ - private boolean interactionUnderway; - private boolean iOwnInteraction; - - private boolean noAltKeyMode; - private boolean autoRedrawMode = true; - - /** Simple state machine for computing distance dragged */ - private boolean button1Down; - private boolean button2Down; - private int numMouseButtons; - private int oldNumMouseButtons; - private int lastX; - private int lastY; - - /** Camera parameters */ - private float minFocalDist = 1.0f; - private Vec3f dolly = new Vec3f(0, 0, 10); // Amount we have "backed up" from focal point - private Vec3f center = new Vec3f(0, 0, 0); // Position of focal point in world coordinates - private Rotf orientation = new Rotf(); - private float rotateSpeed = 1.0f; - private float minRotateSpeed = 0.0001f; - private float dollySpeed = 2.0f; - private float minDollySpeed = 0.0001f; - private float zNear = 1.0f; - private float zFar = 100.0f; - private float vertFOVScale = 1.0f; - private CameraParameters params = new CameraParameters(); - - /** Our bounding sphere provider (for viewAll()) */ - private BSphereProvider provider; - - private MouseMotionAdapter mouseMotionListener = new MouseMotionAdapter() { - public void mouseDragged(MouseEvent e) { - motionMethod(e, e.getX(), e.getY()); - } - - public void mouseMoved(MouseEvent e) { - passiveMotionMethod(e); - } - }; - - private MouseAdapter mouseListener = new MouseAdapter() { - public void mousePressed(MouseEvent e) { - mouseMethod(e, e.getModifiers(), true, e.getX(), e.getY()); - } - - public void mouseReleased(MouseEvent e) { - mouseMethod(e, e.getModifiers(), false, e.getX(), e.getY()); - } - }; - - private GLEventListener glListener = new GLEventListener() { - public void init(GLAutoDrawable drawable) {} - public void display(GLAutoDrawable drawable) {} - public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) { - reshapeMethod(width, height); - } - public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) {} - }; - - /** The constructor takes the number of mouse buttons on this system - (couldn't figure out how to determine this internally) */ - public ExaminerViewer(int numMouseButtons) { - this.numMouseButtons = numMouseButtons; - oldNumMouseButtons = numMouseButtons; - } - - /** <P> Attaches this ExaminerViewer to the given GLAutoDrawable. This - causes the ManipManager's mouse routines to be removed from the - window (using ManipManager.removeMouseListeners) and the - ExaminerViewer's to be installed. The GLAutoDrawable should be - registered with the ManipManager before the ExaminerViewer is - attached to it. </P> - - <P> In order for the viewer to do anything useful, you need to - provide a BSphereProvider to it to allow "view all" - functionality. </P> */ - public void attach(GLAutoDrawable window, BSphereProvider provider) { - this.window = window; - this.provider = provider; - init(); - setupListeners(); - } - - /** Detaches from the given window. This causes the ManipManager's - mouse listeners to be reinstalled on the GLAutoDrawable and the - ExaminerViewer's to be removed. */ - public void detach() { - removeListeners(); - this.window = null; - this.provider = null; - } - - /** Call this at the end of your display() method to cause the - Modelview matrix to be recomputed for the next frame. */ - public void update(GL gl) { - recalc(gl); - } - - /** Call this to apply the inverse rotation matrix of the camera to - the current matrix. This is useful for drawing a skybox. Does - not update which OpenGL matrix is currently being modified or - the ExaminerViewer's camera parameters. */ - public void updateInverseRotation(GL gl) { - recalcInverseRotation(gl); - } - - /** Call this to force the ExaminerViewer to update its - CameraParameters without touching the OpenGL state. */ - public void update() { - recalc(); - } - - /** Call this from within your display() method to cause the - ExaminerViewer to recompute its position based on the visible - geometry. A BSphereProvider must have already been set or this - method has no effect. */ - public void viewAll(GL gl) { - if (provider == null) { - return; - } - // Figure out how far to move - float vertFOV, horizFOV, minFOV; - float adjustedVertFOV = params.getVertFOV() * vertFOVScale; - vertFOV = 2.0f * adjustedVertFOV; - horizFOV = 2.0f * (float) Math.atan(params.getImagePlaneAspectRatio() * - Math.tan(adjustedVertFOV)); - if (vertFOV < horizFOV) - minFOV = vertFOV; - else - minFOV = horizFOV; - if (minFOV == 0.0f) { - throw new RuntimeException("Minimum field of view was zero"); - } - BSphere bsph = provider.getBoundingSphere(); - float dist = bsph.getRadius() / (float) Math.sin(minFOV / 2.0f); - dolly.setZ(dist); - center.set(bsph.getCenter()); - recalc(gl); - } - - /** Get the camera parameters out of this Examiner Viewer (for - example, to pass to ManipManager.updateCameraParameters()). Note - that mutating the returned object is not recommended but - regardless will have no effect on the ExaminerViewer. */ - public CameraParameters getCameraParameters() { - return params; - } - - /** These routines can be hooked into a GUI by calling them from - ActionEvent listeners for buttons elsewhere in the application. */ - public void rotateFaster() { - rotateSpeed *= 2.0f; - } - - public void rotateSlower() { - if (rotateSpeed < minRotateSpeed) - return; - else - rotateSpeed /= 2.0f; - } - - public void dollyFaster() { - dollySpeed *= 2.0f; - } - - public void dollySlower() { - if (dollySpeed < minDollySpeed) - return; - else - dollySpeed /= 2.0f; - } - - public float getZNear() { - return zNear; - } - - public void setZNear(float zNear) { - this.zNear = zNear; - } - - public float getZFar() { - return zFar; - } - - public void setZFar(float zFar) { - this.zFar = zFar; - } - - /** Takes HALF of the vertical angular span of the frustum, - specified in radians. For example, if your <b>fovy</b> argument - to gluPerspective() is 90, then this would be Math.PI / 4. Note - that the ExaminerViewer's algorithms break down if the vertical - field of view approaches or exceeds 180 degrees, or Math.PI / - 2. */ - public void setVertFOV(float vertFOV) { - vertFOVScale = (float) (vertFOV / (Math.PI / 4)); - } - - /** Sets the position of this ExaminerViewer. */ - public void setPosition(Vec3f position) { - Vec3f tmp = orientation.rotateVector(Vec3f.NEG_Z_AXIS); - tmp.scale(dolly.z()); - center.add(position, tmp); - } - - /** Sets the orientation of this ExaminerViewer. */ - public void setOrientation(Rotf orientation) { - this.orientation.set(orientation); - } - - public void setNoAltKeyMode(boolean noAltKeyMode) { - this.noAltKeyMode = noAltKeyMode; - if (noAltKeyMode) { - // FIXME: this is a hack to work around Windows' apparently - // conflating the alt/meta key with one of the mouse buttons - oldNumMouseButtons = numMouseButtons; - numMouseButtons = 3; - } else { - numMouseButtons = oldNumMouseButtons; - } - } - - public boolean getNoAltKeyMode() { - return noAltKeyMode; - } - - /** Enables or disables the automatic redrawing of the - GLAutoDrawable to which this ExaminerViewer is attached. If the - GLAutoDrawable is already being animated, disabling auto redraw - mode may provide better performance. Defaults to on. */ - public void setAutoRedrawMode(boolean onOrOff) { - autoRedrawMode = onOrOff; - } - - /** Returns whether this ExaminerViewer automatically redraws the - GLAutoDrawable to which it is attached upon updates. */ - public boolean getAutoRedrawMode() { - return autoRedrawMode; - } - - /** Rotates this ExaminerViewer about the focal point by the - specified incremental rotation; performs postmultiplication, - i.e. the incremental rotation is applied after the current - orientation. */ - public void rotateAboutFocalPoint(Rotf rot) { - orientation = rot.times(orientation); - orientation.normalize(); - } - - //---------------------------------------------------------------------- - // Internals only below this point - // - - private static final float EPSILON = 0.0001f; - - private void setupListeners() { - ManipManager.getManipManager().removeMouseListeners(window); - window.addMouseMotionListener(mouseMotionListener); - window.addMouseListener(mouseListener); - window.addGLEventListener(glListener); - } - - private void removeListeners() { - if (window != null) { - window.removeMouseMotionListener(mouseMotionListener); - window.removeMouseListener(mouseListener); - window.removeGLEventListener(glListener); - ManipManager.getManipManager().setupMouseListeners(window); - } - } - - private void passiveMotionMethod(MouseEvent e) { - ManipManager.getManipManager().mouseMoved(e); - } - - private boolean modifiersMatch(MouseEvent e, int mods) { - if (noAltKeyMode) { - if ((mods & MouseEvent.BUTTON1_MASK) != 0 && - (mods & MouseEvent.BUTTON2_MASK) == 0 && - (mods & MouseEvent.BUTTON3_MASK) == 0) { - return (!e.isAltDown() && !e.isMetaDown() && !e.isControlDown() && !e.isShiftDown()); - } else { - // At least on Windows, meta seems to be declared to be down on right button presses - return !e.isControlDown() && !e.isShiftDown(); - } - } else { - return ((e.isAltDown() || e.isMetaDown()) && - (!e.isControlDown() && !e.isShiftDown())); - } - } - - private void init() { - interactionUnderway = false; - iOwnInteraction = false; - button1Down = false; - button2Down = false; - - int xSize = window.getWidth(); - int ySize = window.getHeight(); - params.setOrientation(orientation); - params.setPosition(computePosition(new Vec3f())); - params.setForwardDirection(Vec3f.NEG_Z_AXIS); - params.setUpDirection(Vec3f.Y_AXIS); - params.setVertFOV((float) Math.PI / 8.0f); - params.setImagePlaneAspectRatio((float) xSize / (float) ySize); - params.setXSize(xSize); - params.setYSize(ySize); - } - - private void motionMethod(MouseEvent e, int x, int y) { - if (interactionUnderway && !iOwnInteraction) { - ManipManager.getManipManager().mouseDragged(e); - } else { - int dx = x - lastX; - int dy = y - lastY; - - lastX = x; - lastY = y; - - if ((button1Down && (!button2Down))) { - - // Rotation functionality - float xRads = (float) Math.PI * -1.0f * dy * rotateSpeed / 1000.0f; - float yRads = (float) Math.PI * -1.0f * dx * rotateSpeed / 1000.0f; - Rotf xRot = new Rotf(Vec3f.X_AXIS, xRads); - Rotf yRot = new Rotf(Vec3f.Y_AXIS, yRads); - Rotf newRot = yRot.times(xRot); - orientation = orientation.times(newRot); - - } else if (button2Down && (!button1Down)) { - - // Translate functionality - // Compute the local coordinate system's difference vector - Vec3f localDiff = new Vec3f(dollySpeed * -1.0f * dx / 100.0f, - dollySpeed * dy / 100.0f, - 0.0f); - // Rotate this by camera's orientation - Vec3f worldDiff = orientation.rotateVector(localDiff); - // Add on to center - center.add(worldDiff); - - } else if (button1Down && button2Down) { - - float diff = dollySpeed * -1.0f * dy / 100.0f; - float newDolly = dolly.z() + diff; - if (newDolly < minFocalDist) { - newDolly = minFocalDist; - } - dolly.setZ(newDolly); - - } - - if (autoRedrawMode) { - // Force redraw - window.repaint(); - } - } - } - - private void mouseMethod(MouseEvent e, int mods, boolean press, - int x, int y) { - if ((interactionUnderway && !iOwnInteraction) || - (!modifiersMatch(e, mods))) { - // Update state and pass this event along to the ManipManager - if (press) { - interactionUnderway = true; - iOwnInteraction = false; - ManipManager.getManipManager().mousePressed(e); - } else { - interactionUnderway = false; - iOwnInteraction = false; - ManipManager.getManipManager().mouseReleased(e); - } - } else { - if ((mods & MouseEvent.BUTTON1_MASK) != 0) { - if (press) { - button1Down = true; - } else { - button1Down = false; - } - } else { - if (numMouseButtons != 3) { - if ((mods & MouseEvent.BUTTON2_MASK) != 0) { - if (press) { - button2Down = true; - } else { - button2Down = false; - } - } - } else { - // FIXME: must test this on 3-button system - if ((mods & MouseEvent.BUTTON3_MASK) != 0) { - if (press) { - button2Down = true; - } else { - button2Down = false; - } - } - } - } - - lastX = x; - lastY = y; - - if (button1Down || button2Down) { - interactionUnderway = true; - iOwnInteraction = true; - } else { - interactionUnderway = false; - iOwnInteraction = false; - } - - if (autoRedrawMode) { - // Force redraw - window.repaint(); - } - } - } - - private void reshapeMethod(int w, int h) { - float aspect, theta; - aspect = (float) w / (float) h; - if (w >= h) - theta = 45; - else - theta = (float) Math.toDegrees(Math.atan(1 / aspect)); - theta *= vertFOVScale; - params.setVertFOV((float) (Math.toRadians(theta) / 2.0)); - params.setImagePlaneAspectRatio(aspect); - params.setXSize(w); - params.setYSize(h); - } - - private void recalc() { - // Recompute position, forward and up vectors - Vec3f tmp = new Vec3f(); - params.setPosition(computePosition(tmp)); - orientation.rotateVector(Vec3f.NEG_Z_AXIS, tmp); - params.setForwardDirection(tmp); - orientation.rotateVector(Vec3f.Y_AXIS, tmp); - params.setUpDirection(tmp); - params.setOrientation(orientation); - - // Compute modelview matrix based on camera parameters, position and - // orientation - Mat4f tmpMat = new Mat4f(); - tmpMat.makeIdent(); - tmpMat.setRotation(orientation); - tmpMat.setTranslation(params.getPosition()); - tmpMat.invertRigid(); - params.setModelviewMatrix(tmpMat); - - // Compute perspective matrix given camera parameters - float deltaZ = zFar - zNear; - float aspect = params.getImagePlaneAspectRatio(); - float radians = params.getVertFOV(); - float sine = (float) Math.sin(radians); - if ((deltaZ == 0) || (sine == 0) || (aspect == 0)) { - tmpMat.makeIdent(); - params.setProjectionMatrix(tmpMat); - return; - } - float cotangent = (float) Math.cos(radians) / sine; - tmpMat.makeIdent(); - tmpMat.set(0, 0, cotangent / aspect); - tmpMat.set(1, 1, cotangent); - tmpMat.set(2, 2, -(zFar + zNear) / deltaZ); - tmpMat.set(3, 2, -1); - tmpMat.set(2, 3, -2 * zNear * zFar / deltaZ); - tmpMat.set(3, 3, 0); - params.setProjectionMatrix(tmpMat); - - - /******************** - - // Recompute position, forward and up vectors - params.setPosition(position); - Vec3f tmp = new Vec3f(); - orientation.rotateVector(Vec3f.NEG_Z_AXIS, tmp); - params.setForwardDirection(tmp); - orientation.rotateVector(Vec3f.Y_AXIS, tmp); - params.setUpDirection(tmp); - params.setOrientation(orientation); - - // Compute modelview matrix based on camera parameters, position and - // orientation - Mat4f tmpMat = new Mat4f(); - tmpMat.makeIdent(); - tmpMat.setRotation(orientation); - tmpMat.setTranslation(position); - tmpMat.invertRigid(); - params.setModelviewMatrix(tmpMat); - - // Compute perspective matrix given camera parameters - float deltaZ = zFar - zNear; - float aspect = params.getImagePlaneAspectRatio(); - float radians = params.getVertFOV(); - float sine = (float) Math.sin(radians); - if ((deltaZ == 0) || (sine == 0) || (aspect == 0)) { - tmpMat.makeIdent(); - params.setProjectionMatrix(tmpMat); - return; - } - float cotangent = (float) Math.cos(radians) / sine; - tmpMat.makeIdent(); - tmpMat.set(0, 0, cotangent / aspect); - tmpMat.set(1, 1, cotangent); - tmpMat.set(2, 2, -(zFar + zNear) / deltaZ); - tmpMat.set(3, 2, -1); - tmpMat.set(2, 3, -2 * zNear * zFar / deltaZ); - tmpMat.set(3, 3, 0); - params.setProjectionMatrix(tmpMat); - - **********************/ - } - - private void recalc(GL gl) { - recalc(); - - gl.glMatrixMode(GL.GL_MODELVIEW); - float[] data = new float[16]; - params.getModelviewMatrix().getColumnMajorData(data); - gl.glLoadMatrixf(data, 0); - - gl.glMatrixMode(GL.GL_PROJECTION); - params.getProjectionMatrix().getColumnMajorData(data); - gl.glLoadMatrixf(data, 0); - } - - private void recalcInverseRotation(GL gl) { - Rotf oriInv = orientation.inverse(); - Vec3f tmp = new Vec3f(); - float ang = orientation.get(tmp); - if (tmp.lengthSquared() > EPSILON) - gl.glRotatef((float) Math.toDegrees(ang), tmp.x(), tmp.y(), tmp.z()); - } - - private Vec3f computePosition(Vec3f tmp) { - orientation.rotateVector(dolly, tmp); - tmp.add(center); - return tmp; - } -} |