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Now the mathematical and geometrical classes are serializable; Method to activate and deactivate antialiasing; Implementation of Chaikin and Catmull-Rom algorithms for curve smoothing. Implementation of colorInvert and colorGrayscale methods.
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src/br/com/davidbuzatto/jsge/examples/basic/CurveSmoothingExample.java
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| /* | ||
| * Copyright (C) 2024 Prof. Dr. David Buzatto | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package br.com.davidbuzatto.jsge.examples.basic; | ||
|
|
||
| import br.com.davidbuzatto.jsge.core.engine.EngineFrame; | ||
| import br.com.davidbuzatto.jsge.math.CurveUtils; | ||
| import br.com.davidbuzatto.jsge.math.Vector2; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
||
| /** | ||
| * Exemplo de uso dos métodos de suavização de curvas. | ||
| * | ||
| * @author Prof. Dr. David Buzatto | ||
| */ | ||
| public class CurveSmoothingExample extends EngineFrame { | ||
|
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| private List<Vector2> points; | ||
| private List<Vector2> smoothChaikin; | ||
| private List<Vector2> smoothCatmullRom; | ||
| private boolean pointsChanged; | ||
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| private double tension; | ||
| private int iterations; | ||
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| /** | ||
| * Cria o exemplo. | ||
| */ | ||
| public CurveSmoothingExample() { | ||
| super( 600, 600, "Curve Smoothing", 60, true ); | ||
| } | ||
|
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| @Override | ||
| public void create() { | ||
| points = new ArrayList<>(); | ||
| smoothChaikin = new ArrayList<>(); | ||
| smoothCatmullRom = new ArrayList<>(); | ||
| tension = 0; | ||
| iterations = 1; | ||
| setDefaultFontSize( 20 ); | ||
| setDefaultStrokeLineWidth( 2 ); | ||
| } | ||
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| @Override | ||
| public void update( double delta ) { | ||
|
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| if ( isKeyPressed( KEY_UP ) ) { | ||
| tension += 0.05; | ||
| pointsChanged = true; | ||
| } else if ( isKeyPressed( KEY_DOWN ) ) { | ||
| tension -= 0.05; | ||
| pointsChanged = true; | ||
| } | ||
|
|
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| if ( tension < 0 ) { | ||
| tension = 0; | ||
| pointsChanged = false; | ||
| } else if ( tension > 1 ) { | ||
| tension = 1; | ||
| pointsChanged = false; | ||
| } | ||
|
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| if ( isKeyPressed( KEY_LEFT ) ) { | ||
| iterations--; | ||
| pointsChanged = true; | ||
| } else if ( isKeyPressed( KEY_RIGHT ) ) { | ||
| iterations++; | ||
| pointsChanged = true; | ||
| } | ||
|
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| if ( iterations < 1 ) { | ||
| iterations = 1; | ||
| pointsChanged = false; | ||
| } else if ( iterations > 10 ) { | ||
| iterations = 10; | ||
| pointsChanged = false; | ||
| } | ||
|
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| if ( isMouseButtonPressed( MOUSE_BUTTON_LEFT ) ) { | ||
| points.add( getMousePositionPoint() ); | ||
| pointsChanged = true; | ||
| } | ||
|
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| if ( pointsChanged ) { | ||
| smoothChaikin = CurveUtils.getCurveSmoothingChaikin( points, tension, iterations ); | ||
| smoothCatmullRom = CurveUtils.getSplineInterpolationCatmullRom( points, iterations ); | ||
| pointsChanged = false; | ||
| } | ||
|
|
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| } | ||
|
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| @Override | ||
| public void draw() { | ||
|
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| clearBackground( WHITE ); | ||
|
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| setStrokeLineWidth( 1 ); | ||
| for ( Vector2 point : points ) { | ||
| drawCircle( point, 5, RED ); | ||
| } | ||
|
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| setStrokeDashArray( new float[]{ 4, 4 } ); | ||
| for ( int i = 0; i < points.size() - 1; i++ ) { | ||
| drawLine( points.get( i ), points.get( i + 1 ), BLACK ); | ||
| } | ||
|
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| setStrokeLineWidth( 4 ); | ||
| setStrokeDashArray( null ); | ||
| for ( int i = 0; i < smoothChaikin.size() - 1; i++ ) { | ||
| drawLine( smoothChaikin.get( i ), smoothChaikin.get( i + 1 ), BLUE ); | ||
| } | ||
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| for ( int i = 0; i < smoothCatmullRom.size() - 1; i++ ) { | ||
| drawLine( smoothCatmullRom.get( i ), smoothCatmullRom.get( i + 1 ), ORANGE ); | ||
| } | ||
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| drawFPS( 10, 10 ); | ||
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| drawText( "Draw a curve by clicking with the mouse!", 115, 10, BLACK ); | ||
| drawText( "Chaikin", getScreenWidth() - measureText( "Chaikin" ) - 10, getScreenHeight() - 50, BLUE ); | ||
| drawText( "Catmull-Rom", getScreenWidth() - measureText( "Catmull-Rom" ) - 10, getScreenHeight() - 30, ORANGE ); | ||
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| drawText( String.format( "tension: %.2f (UP/DOWN)", tension ), 10, getScreenHeight() - 50, BLACK ); | ||
| drawText( String.format( "iterations: %d (LEFT/RIGHT)", iterations ), 10, getScreenHeight() - 30, BLACK ); | ||
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| } | ||
|
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| /** | ||
| * Executa o exemplo. | ||
| * @param args Argumentos. | ||
| */ | ||
| public static void main( String[] args ) { | ||
| new CurveSmoothingExample(); | ||
| } | ||
|
|
||
| } |
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