protected void drawToolTip(
DrawContext dc,
java.awt.Rectangle viewport,
String text,
int x,
int y,
ToolTipAttributes attributes) {
java.awt.geom.Rectangle2D textBounds = this.computeTextBounds(dc, text, attributes.getFont());
java.awt.geom.Rectangle2D bgBounds =
this.computeBackgroundBounds(
dc, textBounds.getWidth(), textBounds.getHeight(), attributes.getInsets());
java.awt.Point screenPoint = this.adjustDrawPointToViewport(x, y, bgBounds, viewport);
java.awt.geom.Point2D textTranslation =
this.computeTextTranslation(dc, textBounds, attributes.getInsets());
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
OGLStackHandler stackHandler = new OGLStackHandler();
stackHandler.pushModelview(gl);
try {
gl.glTranslated(
screenPoint.getX() + bgBounds.getX(), screenPoint.getY() + bgBounds.getY(), 0);
this.drawToolTipInterior(dc, bgBounds.getWidth(), bgBounds.getHeight(), attributes);
this.drawToolTipOutline(dc, bgBounds.getWidth(), bgBounds.getHeight(), attributes);
gl.glTranslated(textTranslation.getX(), textTranslation.getY(), 0);
this.drawToolTipText(dc, text, 0, 0, attributes);
} finally {
stackHandler.pop(gl);
}
}
protected void drawToolTipInterior(
DrawContext dc, double width, double height, ToolTipAttributes attributes) {
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
this.applyColor(dc, attributes.getInteriorColor(), attributes.getInteriorOpacity());
// Draw a filled rectangle with the background dimensions.
gl.glRectd(0, 0, width, height);
}
protected void endDrawIcons(DrawContext dc) {
if (dc.isPickingMode()) this.pickSupport.endPicking(dc);
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
if (dc.isPickingMode()) {
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, OGLUtil.DEFAULT_TEX_ENV_MODE);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_SRC0_RGB, OGLUtil.DEFAULT_SRC0_RGB);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_COMBINE_RGB, OGLUtil.DEFAULT_COMBINE_RGB);
}
gl.glBindTexture(GL.GL_TEXTURE_2D, 0);
this.oglStackHandler.pop(gl);
}
/**
* Called back immediately after the OpenGL context is initialized. Can be used to perform
* one-time initialization. Run only once.
*/
@Override
public void init(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2(); // get the OpenGL graphics context
glu = new GLU(); // get GL Utilities
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // set background (clear) color
gl.glClearDepth(1.0f); // set clear depth value to farthest
// Do not enable depth test
// gl.glEnable(GL_DEPTH_TEST); // enables depth testing
// gl.glDepthFunc(GL_LEQUAL); // the type of depth test to do
gl.glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // best perspective correction
gl.glShadeModel(GL_SMOOTH); // blends colors nicely, and smoothes out lighting
// Load the texture image
try {
// Use URL so that can read from JAR and disk file.
BufferedImage image = ImageIO.read(this.getClass().getResource(textureFileName));
// Create a OpenGL Texture object
texture = AWTTextureIO.newTexture(GLProfile.getDefault(), image, false);
// Use linear filter if image is larger than the original texture
gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Use linear filter if image is smaller than the original texture
gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
} catch (GLException | IOException e) {
e.printStackTrace();
}
// Texture image flips vertically. Shall use TextureCoords class to retrieve
// the top, bottom, left and right coordinates, instead of using 0.0f and 1.0f.
TextureCoords textureCoords = texture.getImageTexCoords();
textureCoordTop = textureCoords.top();
textureCoordBottom = textureCoords.bottom();
textureCoordLeft = textureCoords.left();
textureCoordRight = textureCoords.right();
// Enable the texture
texture.enable(gl);
texture.bind(gl);
// gl.glEnable(GL_TEXTURE_2D);
// Enable blending
gl.glEnable(GL_BLEND);
gl.glBlendFunc(GL_SRC_ALPHA, GL_ONE);
// Allocate the stars
for (int i = 0; i < stars.length; i++) {
stars[i] = new Star();
// Linearly distributed according to the star number
stars[i].distance = ((float) i / numStars) * 5.0f;
}
}
@Override
public void init(GLAutoDrawable glDrawable) {
GL2 gl = glDrawable.getGL().getGL2();
gl.glShadeModel(GLLightingFunc.GL_SMOOTH);
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.glClearDepth(1.0f);
gl.glEnable(GL.GL_DEPTH_TEST);
gl.glDepthFunc(GL.GL_LEQUAL);
gl.glHint(GL2ES1.GL_PERSPECTIVE_CORRECTION_HINT, GL.GL_NICEST);
}
protected void drawToolTipOutline(
DrawContext dc, double width, double height, ToolTipAttributes attributes) {
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
this.applyColor(dc, attributes.getOutlineColor(), attributes.getOutlineOpacity());
gl.glLineWidth((float) getOutlineWidth());
// Draw a line loop around the background rectangle. Inset the lines slightly to compensate for
// OpenGL's line
// rasterization algorithm. We want the line to straddle the rectangle pixels.
double inset = 0.5;
gl.glBegin(GL2.GL_LINE_LOOP);
gl.glVertex2d(inset, inset);
gl.glVertex2d(width - inset, inset);
gl.glVertex2d(width - inset, height - inset);
gl.glVertex2d(inset, height - inset);
gl.glEnd();
}
@Override
public void reshape(GLAutoDrawable gLDrawable, int x, int y, int width, int height) {
GL2 gl = gLDrawable.getGL().getGL2();
final float aspect = (float) width / (float) height;
gl.glMatrixMode(GLMatrixFunc.GL_PROJECTION);
gl.glLoadIdentity();
final float fh = 0.5f;
final float fw = fh * aspect;
gl.glFrustumf(-fw, fw, -fh, fh, 1.0f, 1000.0f);
gl.glMatrixMode(GLMatrixFunc.GL_MODELVIEW);
gl.glLoadIdentity();
}
protected void beginRendering(DrawContext dc, OGLStackHandler stackHandler) {
if (dc == null) {
String message = Logging.getMessage("nullValue.DrawContextIsNull");
Logging.logger().fine(message);
throw new IllegalArgumentException(message);
}
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
int attribMask =
GL2.GL_COLOR_BUFFER_BIT // for alpha test func and ref, blend func
| GL2.GL_CURRENT_BIT // for current color
| GL2.GL_ENABLE_BIT // for enable/disable
| GL2.GL_LINE_BIT // for line width
| GL2.GL_TRANSFORM_BIT; // for matrix mode
stackHandler.pushAttrib(gl, attribMask);
stackHandler.pushTextureIdentity(gl);
stackHandler.pushProjectionIdentity(gl);
java.awt.Rectangle viewport = dc.getView().getViewport();
gl.glOrtho(
viewport.x, viewport.x + viewport.width, viewport.y, viewport.y + viewport.height, -1, 1);
stackHandler.pushModelviewIdentity(gl);
// Enable the alpha test.
gl.glEnable(GL2.GL_ALPHA_TEST);
gl.glAlphaFunc(GL2.GL_GREATER, 0.0f);
// Enable blending in premultiplied color mode.
gl.glEnable(GL.GL_BLEND);
OGLUtil.applyBlending(gl, true);
gl.glDisable(GL.GL_CULL_FACE);
gl.glDisable(GL.GL_DEPTH_TEST);
gl.glDisable(GL2.GL_LIGHTING);
gl.glDisable(GL.GL_TEXTURE_2D);
}
/**
* Call-back handler for window re-size event. Also called when the drawable is first set to
* visible.
*/
@Override
public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
GL2 gl = drawable.getGL().getGL2(); // get the OpenGL 2 graphics context
if (height == 0) height = 1; // prevent divide by zero
float aspect = (float) width / height;
// Set the view port (display area) to cover the entire window
gl.glViewport(0, 0, width, height);
// Setup perspective projection, with aspect ratio matches viewport
gl.glMatrixMode(GL_PROJECTION); // choose projection matrix
gl.glLoadIdentity(); // reset projection matrix
glu.gluPerspective(45.0, aspect, 0.1, 100.0); // fovy, aspect, zNear, zFar
// Enable the model-view transform
gl.glMatrixMode(GL_MODELVIEW);
gl.glLoadIdentity(); // reset
}
protected void applyBackground(
DrawContext dc,
WWIcon icon,
Vec4 screenPoint,
double width,
double height,
double pedestalSpacing,
double pedestalScale) {
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
double backgroundScale;
backgroundScale = icon.getBackgroundScale();
if (icon.getBackgroundTexture() != null) {
if (icon.getBackgroundTexture().bind(dc)) {
TextureCoords texCoords = icon.getBackgroundTexture().getTexCoords();
gl.glPushMatrix();
gl.glLoadIdentity();
double bgwidth = backgroundScale * width;
double bgheight = backgroundScale * height;
// Offset the background for the highlighted scale.
// if (icon.isHighlighted())
// {
// gl.glTranslated(0d, height * (icon.getHighlightScale() - 1) / 2, 0d);
// }
// Offset the background for the pedestal height.
gl.glTranslated(0d, (pedestalScale * height) + pedestalSpacing, 0d);
// Place the background centered behind the icon.
gl.glTranslated(screenPoint.x - bgwidth / 2, screenPoint.y - (bgheight - height) / 2, 0d);
// Scale to the background image dimension.
gl.glScaled(bgwidth, bgheight, 1d);
dc.drawUnitQuad(texCoords);
gl.glPopMatrix();
}
}
}
@Override
public void display(GLAutoDrawable gLDrawable) {
final GL2 gl = gLDrawable.getGL().getGL2();
gl.glClear(GL.GL_COLOR_BUFFER_BIT);
gl.glClear(GL.GL_DEPTH_BUFFER_BIT);
gl.glLoadIdentity();
gl.glTranslatef(0.0f, 0.0f, -5.0f);
// rotate about the three axes
gl.glRotatef(rotateT, 1.0f, 0.0f, 0.0f);
gl.glRotatef(rotateT, 0.0f, 1.0f, 0.0f);
gl.glRotatef(rotateT, 0.0f, 0.0f, 1.0f);
// Draw A Quad
gl.glBegin(GL2.GL_QUADS);
gl.glColor3f(0.0f, 1.0f, 1.0f); // set the color of the quad
gl.glVertex3f(-1.0f, 1.0f, 0.0f); // Top Left
gl.glVertex3f(1.0f, 1.0f, 0.0f); // Top Right
gl.glVertex3f(1.0f, -1.0f, 0.0f); // Bottom Right
gl.glVertex3f(-1.0f, -1.0f, 0.0f); // Bottom Left
// Done Drawing The Quad
gl.glEnd();
// increasing rotation for the next iteration
rotateT += 0.2f;
}
/** Called back by the animator to perform rendering. */
@Override
public void display(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2(); // get the OpenGL 2 graphics context
gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // clear color and depth buffers
for (int i = 0; i < stars.length; i++) {
// Reset the view (x, y, z axes back to normal)
gl.glLoadIdentity();
gl.glTranslatef(0.0f, 0.0f, z);
// The stars are texture quad square drawn on x-y plane and
// distributed on on x-z plane around the y-axis
// Initial 90 degree tile in the x-axis, y-axis pointing out of screen
gl.glRotatef(tilt, 1.0f, 0.0f, 0.0f);
// Rotate about y-axis (pointing out of screen), initial angle is 0
gl.glRotatef(stars[i].angle, 0.0f, 1.0f, 0.0f);
// Translate about the x-axis (pointing right) to its current distance
gl.glTranslatef(stars[i].distance, 0.0f, 0.0f);
// The stars have initial angle of 0, and initial distance linearly
// distributed between 0 and 5.0f
// Rotate the axes back, so that z-axis is again facing us, to ensure that
// the quad (with texture) on x-y plane is facing us
gl.glRotatef(-stars[i].angle, 0.0f, 1.0f, 0.0f);
gl.glRotatef(-tilt, 1.0f, 0.0f, 0.0f);
// Take note that without the two rotations and undo, there is only one
// translation along the x-axis
// Matrix operation is non-commutative. That is, AB != BA.
// Hence, ABCB'A' != C
// Draw the star, which spins on the z axis (pointing out of the screen)
gl.glRotatef(starSpinAngle, 0.0f, 0.0f, 1.0f);
// Set the star's color using bytes (why bytes? not float or int?)
gl.glColor4ub(stars[i].r, stars[i].g, stars[i].b, (byte) 255);
gl.glBegin(GL_QUADS);
// draw a square on x-y plane
gl.glTexCoord2f(textureCoordLeft, textureCoordBottom);
gl.glVertex3f(-1.0f, -1.0f, 0.0f);
gl.glTexCoord2f(textureCoordRight, textureCoordBottom);
gl.glVertex3f(1.0f, -1.0f, 0.0f);
gl.glTexCoord2f(textureCoordRight, textureCoordTop);
gl.glVertex3f(1.0f, 1.0f, 0.0f);
gl.glTexCoord2f(textureCoordLeft, textureCoordTop);
gl.glVertex3f(-1.0f, 1.0f, 0.0f);
gl.glEnd();
// If twinkling, overlay with another drawing of an arbitrary color
if (twinkleOn) {
// Assign a color using bytes
gl.glColor4ub(
stars[(numStars - i) - 1].r,
stars[(numStars - i) - 1].g,
stars[(numStars - i) - 1].b,
(byte) 255);
gl.glBegin(GL_QUADS);
// draw a square on x-y plane
gl.glTexCoord2f(textureCoordLeft, textureCoordBottom);
gl.glVertex3f(-1.0f, -1.0f, 0.0f);
gl.glTexCoord2f(textureCoordRight, textureCoordBottom);
gl.glVertex3f(1.0f, -1.0f, 0.0f);
gl.glTexCoord2f(textureCoordRight, textureCoordTop);
gl.glVertex3f(1.0f, 1.0f, 0.0f);
gl.glTexCoord2f(textureCoordLeft, textureCoordTop);
gl.glVertex3f(-1.0f, 1.0f, 0.0f);
gl.glEnd();
}
// Update for the next refresh
// The star spins about the z-axis (pointing out of the screen), and spiral
// inwards and collapse towards the center, by increasing the angle on x-y
// plane and reducing the distance.
starSpinAngle += 0.01f; // used to spin the stars about the z-axis
// spiral pattern
stars[i].angle += (float) i / numStars; // changes the angle of a star
// collapsing the star to the center
stars[i].distance -= 0.01f; // changes the distance of a star
// re-bone at the edge
if (stars[i].distance < 0.0f) { // Is the star collapsed to the center?
stars[i].distance += 5.0f; // move to the outer ring
stars[i].setRandomRGB(); // choose a random color for the star
}
}
}
protected Vec4 drawIcon(DrawContext dc, OrderedIcon uIcon) {
if (uIcon.point == null) {
String msg = Logging.getMessage("nullValue.PointIsNull");
Logging.logger().severe(msg);
// Record feedback data for this WWIcon if feedback is enabled.
if (uIcon.icon != null) this.recordFeedback(dc, uIcon.icon, null, null);
return null;
}
WWIcon icon = uIcon.icon;
if (dc.getView().getFrustumInModelCoordinates().getNear().distanceTo(uIcon.point) < 0) {
// Record feedback data for this WWIcon if feedback is enabled.
this.recordFeedback(dc, icon, uIcon.point, null);
return null;
}
final Vec4 screenPoint = dc.getView().project(uIcon.point);
if (screenPoint == null) {
// Record feedback data for this WWIcon if feedback is enabled.
this.recordFeedback(dc, icon, uIcon.point, null);
return null;
}
double pedestalScale;
double pedestalSpacing;
if (this.pedestal != null) {
pedestalScale = this.pedestal.getScale();
pedestalSpacing = pedestal.getSpacingPixels();
} else {
pedestalScale = 0d;
pedestalSpacing = 0d;
}
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
this.setDepthFunc(dc, uIcon, screenPoint);
gl.glMatrixMode(GL2.GL_MODELVIEW);
gl.glLoadIdentity();
Dimension size = icon.getSize();
double width = size != null ? size.getWidth() : icon.getImageTexture().getWidth(dc);
double height = size != null ? size.getHeight() : icon.getImageTexture().getHeight(dc);
gl.glTranslated(
screenPoint.x - width / 2, screenPoint.y + (pedestalScale * height) + pedestalSpacing, 0d);
if (icon.isHighlighted()) {
double heightDelta = this.pedestal != null ? 0 : height / 2; // expand only above the pedestal
gl.glTranslated(width / 2, heightDelta, 0);
gl.glScaled(icon.getHighlightScale(), icon.getHighlightScale(), icon.getHighlightScale());
gl.glTranslated(-width / 2, -heightDelta, 0);
}
Rectangle rect =
new Rectangle(
(int) (screenPoint.x - width / 2),
(int) (screenPoint.y),
(int) width,
(int) (height + (pedestalScale * height) + pedestalSpacing));
if (dc.isPickingMode()) {
// If in picking mode and pick clipping is enabled, check to see if the icon is within the
// pick volume.
if (this.isPickFrustumClippingEnabled() && !dc.getPickFrustums().intersectsAny(rect)) {
// Record feedback data for this WWIcon if feedback is enabled.
this.recordFeedback(dc, icon, uIcon.point, rect);
return screenPoint;
} else {
java.awt.Color color = dc.getUniquePickColor();
int colorCode = color.getRGB();
this.pickSupport.addPickableObject(colorCode, icon, uIcon.getPosition(), false);
gl.glColor3ub((byte) color.getRed(), (byte) color.getGreen(), (byte) color.getBlue());
}
}
if (icon.getBackgroundTexture() != null)
this.applyBackground(dc, icon, screenPoint, width, height, pedestalSpacing, pedestalScale);
if (icon.getImageTexture().bind(dc)) {
TextureCoords texCoords = icon.getImageTexture().getTexCoords();
gl.glScaled(width, height, 1d);
dc.drawUnitQuad(texCoords);
}
if (this.pedestal != null && this.pedestal.getImageTexture() != null) {
gl.glLoadIdentity();
gl.glTranslated(screenPoint.x - (pedestalScale * (width / 2)), screenPoint.y, 0d);
gl.glScaled(width * pedestalScale, height * pedestalScale, 1d);
if (this.pedestal.getImageTexture().bind(dc)) {
TextureCoords texCoords = this.pedestal.getImageTexture().getTexCoords();
dc.drawUnitQuad(texCoords);
}
}
// Record feedback data for this WWIcon if feedback is enabled.
this.recordFeedback(dc, icon, uIcon.point, rect);
return screenPoint;
}
protected void beginDrawIcons(DrawContext dc) {
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
this.oglStackHandler.clear();
int attributeMask =
GL2.GL_DEPTH_BUFFER_BIT // for depth test, depth mask and depth func
| GL2.GL_TRANSFORM_BIT // for modelview and perspective
| GL2.GL_VIEWPORT_BIT // for depth range
| GL2.GL_CURRENT_BIT // for current color
| GL2.GL_COLOR_BUFFER_BIT // for alpha test func and ref, and blend
| GL2.GL_DEPTH_BUFFER_BIT // for depth func
| GL2.GL_ENABLE_BIT; // for enable/disable changes
this.oglStackHandler.pushAttrib(gl, attributeMask);
// Apply the depth buffer but don't change it.
if ((!dc.isDeepPickingEnabled())) gl.glEnable(GL.GL_DEPTH_TEST);
gl.glDepthMask(false);
// Suppress any fully transparent image pixels
gl.glEnable(GL2.GL_ALPHA_TEST);
gl.glAlphaFunc(GL2.GL_GREATER, 0.001f);
// Load a parallel projection with dimensions (viewportWidth, viewportHeight)
this.oglStackHandler.pushProjectionIdentity(gl);
gl.glOrtho(
0d, dc.getView().getViewport().width, 0d, dc.getView().getViewport().height, -1d, 1d);
this.oglStackHandler.pushModelview(gl);
this.oglStackHandler.pushTexture(gl);
if (dc.isPickingMode()) {
this.pickSupport.beginPicking(dc);
// Set up to replace the non-transparent texture colors with the single pick color.
gl.glEnable(GL.GL_TEXTURE_2D);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, GL2.GL_COMBINE);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_SRC0_RGB, GL2.GL_PREVIOUS);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_COMBINE_RGB, GL2.GL_REPLACE);
} else {
gl.glEnable(GL.GL_TEXTURE_2D);
gl.glEnable(GL.GL_BLEND);
gl.glBlendFunc(GL.GL_ONE, GL.GL_ONE_MINUS_SRC_ALPHA);
}
}
