DrawObject.java

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/*******************************************************************************
 * Copyright (c) 2013 Stefan Profanter. All rights reserved. This program and the accompanying
 * materials are made available under the terms of the GNU Public License v3.0 which accompanies
 * this distribution, and is available at http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors: Stefan Profanter - initial API and implementation, Year: 2013
 ******************************************************************************/
package edu.tum.cs.vis.model.util;

import java.io.Serializable;

import javax.vecmath.Vector3f;

import processing.core.PGraphics;

public abstract class DrawObject implements Serializable {
        private static final long       serialVersionUID        = -1917773602783043823L;

        public static float[][] MatrixMultiply(float mat1[][], float mat2[][]) {
                int x = mat1.length;
                int y = mat2.length;
                float result[][] = new float[x][y];

                for (int i = 0; i < x; i++) {
                        for (int j = 0; j < y - 1; j++) {
                                for (int k = 0; k < y; k++) {

                                        result[i][j] += mat1[i][k] * mat2[k][j];
                                }
                        }
                }

                return result;
        }

        protected Vertex                position[];

        protected Appearance    appearance;

        public DrawObject(final int numberOfEdges) {
                position = new Vertex[numberOfEdges];
        }

        protected void applyColor(PGraphics g, DrawSettings drawSettings) {
                if (appearance == null) {

                        g.noStroke();
                        g.noFill();
                        if (drawSettings == null || drawSettings.drawType == DrawType.FILL) {
                                if (drawSettings != null && drawSettings.getOverrideColor() != null)
                                        g.fill(drawSettings.getOverrideColor().getRed(), drawSettings
                                                        .getOverrideColor().getGreen(), drawSettings.getOverrideColor()
                                                        .getBlue(), drawSettings.getOverrideColor().getAlpha());
                                else
                                        g.fill(200, 200, 200);
                        } else {
                                if (drawSettings.getOverrideColor() != null)
                                        g.stroke(drawSettings.getOverrideColor().getRed(), drawSettings
                                                        .getOverrideColor().getGreen(), drawSettings.getOverrideColor()
                                                        .getBlue(), drawSettings.getOverrideColor().getAlpha());
                                else
                                        g.stroke(200, 200, 200);
                                g.strokeWeight(drawSettings.getLineWidth());
                        }
                        return;
                }
                if (appearance.getColorLine() != null) {
                        if (drawSettings != null && drawSettings.getOverrideColor() != null)
                                g.stroke(drawSettings.getOverrideColor().getRed(), drawSettings.getOverrideColor()
                                                .getGreen(), drawSettings.getOverrideColor().getBlue(), drawSettings
                                                .getOverrideColor().getAlpha());
                        else
                                g.stroke(appearance.getColorLine().getRed(), appearance.getColorLine().getGreen(),
                                                appearance.getColorLine().getBlue(), appearance.getColorLine().getAlpha());
                        g.strokeWeight(appearance.getStrokeWeight());
                } else {
                        g.noStroke();
                }

                if (drawSettings == null || drawSettings.drawType == DrawType.FILL) {
                        if (drawSettings != null && drawSettings.getOverrideColor() != null)
                                g.fill(drawSettings.getOverrideColor().getRed(), drawSettings.getOverrideColor()
                                                .getGreen(), drawSettings.getOverrideColor().getBlue(), drawSettings
                                                .getOverrideColor().getAlpha());
                        else if (appearance.getImageReference() == null) {
                                if (appearance.getColorFill() != null) {
                                        g.fill(appearance.getColorFill().getRed(),
                                                        appearance.getColorFill().getGreen(), appearance.getColorFill()
                                                                        .getBlue(), appearance.getColorFill().getAlpha() == 0 ? 255
                                                                        : appearance.getColorFill().getAlpha());
                                } else {
                                        g.noFill();
                                }
                        } else {
                                // Has texture
                                // Use fallback if texture isn't drawn. So fill triangles with white color
                                g.fill(255, 255, 255, 0);
                        }
                } else {
                        if (drawSettings != null && drawSettings.getOverrideColor() != null)
                                g.stroke(drawSettings.getOverrideColor().getRed(), drawSettings.getOverrideColor()
                                                .getGreen(), drawSettings.getOverrideColor().getBlue(), drawSettings
                                                .getOverrideColor().getAlpha());
                        else if (appearance.getColorFill() != null) {
                                g.stroke(appearance.getColorFill().getRed(), appearance.getColorFill().getGreen(),
                                                appearance.getColorFill().getBlue(),
                                                appearance.getColorFill().getAlpha() == 0 ? 255 : appearance.getColorFill()
                                                                .getAlpha());
                        } else
                                g.stroke(255, 255, 255);
                        g.strokeWeight(drawSettings.getLineWidth());
                }
        }

        @Override
        public boolean equals(Object o) {
                if (o == this) {
                        return true;
                }
                if (!(o instanceof DrawObject)) {
                        return false;
                }

                DrawObject t = (DrawObject) o;
                if (t.position.length != t.position.length)
                        return false;
                int cnt = 0;
                int maxCnt = position.length;
                for (int k = 0; k < maxCnt; k++) {
                        for (int l = 0; l < maxCnt; l++) {
                                if (t.position[k].equals(position[l]))
                                        cnt++;
                        }
                }
                return (cnt == maxCnt);
        }

        public Appearance getAppearance() {
                return appearance;
        }

        public Vertex[] getPosition() {
                return position;
        }

        public void scale(float factor) {
                for (int v = 0; v < position.length; v++) {
                        position[v].x *= factor;
                        position[v].y *= factor;
                        position[v].z *= factor;
                }
                updateCentroid(); // Recalculate centroid
        }

        public void setAppearance(Appearance appearance) {
                this.appearance = appearance;
        }

        public void setPosition(Vertex[] position) {
                this.position = position;
                updateCentroid();
        }

        public void transform(float[][] matrix) {
                for (int v = 0; v < position.length; v++) {
                        float[] newPos = new float[4];
                        for (int row = 0; row < 4; row++) {
                                newPos[row] = position[v].x * matrix[row][0] + position[v].y * matrix[row][1]
                                                + position[v].z * matrix[row][2] + matrix[row][3];
                        }
                        position[v].x = newPos[0] / newPos[3];
                        position[v].y = newPos[1] / newPos[3];
                        position[v].z = newPos[2] / newPos[3];
                }
                updateCentroid();
        }

        public void updateCentroid() {
                /*
                 * Overridden in triangles class
                 */
        }

        public Vector3f[] getEdges() {
                Vector3f e[] = new Vector3f[3];

                for (int j = 0; j < position.length; j++) {
                        e[j] = new Vector3f(position[(j + 2) % position.length]);
                        e[j].sub(position[(j + 1) % position.length]);
                }
                return e;
        }

}