/*
- * Sixth 3D engine. Author: Svjatoslav Agejenko.
+ * Sixth 3D engine. Author: Svjatoslav Agejenko.
* This project is released under Creative Commons Zero (CC0) license.
*/
package eu.svjatoslav.sixth.e3d.gui;
+import eu.svjatoslav.sixth.e3d.geometry.Point2D;
import eu.svjatoslav.sixth.e3d.gui.humaninput.MouseEvent;
import eu.svjatoslav.sixth.e3d.gui.humaninput.MouseInteractionController;
import java.awt.image.DataBufferByte;
import java.awt.image.WritableRaster;
+/**
+ * Rendering context that contains all the information that is needed to render the scene.
+ */
+
public class RenderingContext {
public static final int bufferedImageType = BufferedImage.TYPE_4BYTE_ABGR;
+
public final Graphics2D graphics;
+
+ /**
+ * Pixels of the rendering area.
+ * Each pixel is represented by 4 bytes: alpha, blue, green, red.
+ */
public final byte[] pixels;
+
+ /**
+ * Width of the rendering area in pixels.
+ */
public final int width;
+
+ /**
+ * Height of the rendering area in pixels.
+ */
public final int height;
- public final int xCenter;
- public final int yCenter;
+
+ /**
+ * Center of the screen in screen space (pixels).
+ * This is the point where (0,0) coordinate of the world space is rendered.
+ */
+ public final Point2D centerCoordinate;
+
+ /**
+ * Zoom factor. The bigger the value, the more zoomed in the view is.
+ */
public final double zoom;
final BufferedImage bufferedImage;
+ /**
+ * Number of frame that is currently being rendered.
+ * Every frame has its own number.
+ */
public int frameNumber = 0;
/**
* UI component that mouse is currently hovering over.
*/
- private MouseInteractionController currentMouseOverComponent;
-
- public void prepareForNewFrameRendering(){
- mouseEvent = null;
- objectUnderMouse = null;
- }
-
+ private MouseInteractionController objectPreviouslyUnderMouseCursor;
/**
* Mouse click event that needs to be processed.
+ * This event is processed only once per frame.
+ * If there are multiple objects under mouse cursor, the top-most object will receive the event.
+ * If there are no objects under mouse cursor, the event will be ignored.
+ * If there is no event, this field will be null.
+ * This field is set to null after the event is processed.
*/
- private MouseEvent mouseEvent;
-
- public void setMouseEvent(MouseEvent mouseEvent) {
- this.mouseEvent = mouseEvent;
- }
-
- public MouseEvent getMouseEvent() {
- return mouseEvent;
- }
-
- /**
- * Item that user clicked on.
- */
- private MouseInteractionController objectUnderMouse;
-
+ private MouseEvent mouseEvent;
/**
- * Called when given object was detected under mouse cursor, while processing {@link #mouseEvent}.
- * Because objects are rendered back to front. The last method caller will set the top-most object, if
- * there are multiple objects under mouse cursor.
+ * UI component that mouse is currently hovering over.
*/
- public void setObjectUnderMouse(MouseInteractionController objectUnderMouse) {
- this.objectUnderMouse = objectUnderMouse;
- }
+ private MouseInteractionController currentObjectUnderMouseCursor;
public RenderingContext(final int width, final int height) {
this.width = width;
this.height = height;
-
- this.xCenter = width / 2;
- this.yCenter = height / 2;
-
+ this.centerCoordinate = new Point2D(width / 2d, height / 2d);
this.zoom = width / 3d;
bufferedImage = new BufferedImage(width, height, bufferedImageType);
graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
}
+ public void prepareForNewFrameRendering() {
+ mouseEvent = null;
+ currentObjectUnderMouseCursor = null;
+ }
+
+ public MouseEvent getMouseEvent() {
+ return mouseEvent;
+ }
+
+ public void setMouseEvent(MouseEvent mouseEvent) {
+ this.mouseEvent = mouseEvent;
+ }
+
+ /**
+ * Called when given object was detected under mouse cursor, while processing {@link #mouseEvent}.
+ * Because objects are rendered back to front. The last method caller will set the top-most object, if
+ * there are multiple objects under mouse cursor.
+ */
+ public void setCurrentObjectUnderMouseCursor(MouseInteractionController currentObjectUnderMouseCursor) {
+ this.currentObjectUnderMouseCursor = currentObjectUnderMouseCursor;
+ }
+
/**
- * @return <code>true</code> if view repaint is needed.
+ * @return <code>true</code> if view update is needed as a consequence of this mouse event.
*/
- public boolean handleDetectedComponentMouseEvents() {
- if (objectUnderMouse != null) {
- if (mouseEvent.button == 0) {
- // mouse over
- if (currentMouseOverComponent == null) {
- currentMouseOverComponent = objectUnderMouse;
- return currentMouseOverComponent.mouseEntered();
- } else if (currentMouseOverComponent != objectUnderMouse) {
- boolean viewRepaintNeeded = currentMouseOverComponent.mouseExited();
- currentMouseOverComponent = objectUnderMouse;
- return viewRepaintNeeded | currentMouseOverComponent.mouseEntered();
- }
- } else {
- // mouse click
- return objectUnderMouse.mouseClicked();
- }
- } else if (currentMouseOverComponent != null) {
- boolean viewRepaintNeeded = currentMouseOverComponent.mouseExited();
- currentMouseOverComponent = null;
- return viewRepaintNeeded;
+ public boolean handlePossibleComponentMouseEvent() {
+ if (mouseEvent == null) return false;
+
+ boolean viewRepaintNeeded = false;
+
+ if (objectPreviouslyUnderMouseCursor != currentObjectUnderMouseCursor) {
+ // Mouse cursor has just entered or left component.
+ viewRepaintNeeded = objectPreviouslyUnderMouseCursor != null && objectPreviouslyUnderMouseCursor.mouseExited();
+ viewRepaintNeeded |= currentObjectUnderMouseCursor != null && currentObjectUnderMouseCursor.mouseEntered();
+ objectPreviouslyUnderMouseCursor = currentObjectUnderMouseCursor;
+ }
+
+ if (mouseEvent.button != 0 && currentObjectUnderMouseCursor != null) {
+ // Mouse button was clicked on some component.
+ viewRepaintNeeded |= currentObjectUnderMouseCursor.mouseClicked(mouseEvent.button);
}
- return false;
+
+ return viewRepaintNeeded;
}
}
projects / sixth-3d.git / blobdiff