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Open Source Chemistry Library
/*
* Copyright (c) 1997 - 2016
* Actelion Pharmaceuticals Ltd.
* Gewerbestrasse 16
* CH-4123 Allschwil, Switzerland
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of the the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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*/
package com.actelion.research.chem;
import java.awt.geom.*;
public class DepictorTransformation {
private float mOffsetX,mOffsetY,mScaling;
public DepictorTransformation() {
clear();
}
public DepictorTransformation(DepictorTransformation t) {
mScaling = t.mScaling;
mOffsetX = t.mOffsetX;
mOffsetY = t.mOffsetY;
}
public DepictorTransformation(float scaling, float offsetX, float offsetY) {
mScaling = scaling;
mOffsetX = offsetX;
mOffsetY = offsetY;
}
public DepictorTransformation(Rectangle2D.Float bounds,
Rectangle2D.Float view,
float averageBondLength,
int mode) {
// calculates transformation needed to transfer bounds into view considering mode.
// averageBondLength may be 0 if (mode & cModeInflateToMaxAVBL) == 0.
clear();
if (view != null) {
if ((mode & AbstractDepictor.cModeInflateToAVBL) == 0) {
// check if bounds fit in view. If not then center and reduce if needed
if (!view.contains(bounds)) {
if ((bounds.width > view.width) || (bounds.height > view.height)) {
float hScaling = view.width / bounds.width;
float vScaling = view.height / bounds.height;
mScaling = Math.min(hScaling, vScaling);
}
if (bounds.x*mScaling < view.x)
mOffsetX = view.x - bounds.x*mScaling;
else if ((bounds.x+bounds.width)*mScaling > view.x+view.width)
mOffsetX = view.x+view.width - (bounds.x+bounds.width)*mScaling;
if (bounds.y*mScaling < view.y)
mOffsetY = view.y - bounds.y*mScaling;
else if ((bounds.y+bounds.height)*mScaling > view.y+view.height)
mOffsetY = view.y+view.height - (bounds.y+bounds.height)*mScaling;
// for keeping all stuff centered do the following:
// mOffsetX = view.x+view.width/2.0 - mScaling*(bounds.x+bounds.width/2.0);
// mOffsetY = view.y+view.height/2.0 - mScaling*(bounds.y+bounds.height/2.0);
}
}
else {
// inflate to maximum bond length or maximum that fits
float hScaling = view.width / bounds.width;
float vScaling = view.height / bounds.height;
float maxAVBL = mode & AbstractDepictor.cModeMaxBondLength;
if (maxAVBL == 0)
maxAVBL = AbstractDepictor.cOptAvBondLen;
else if ((mode & AbstractDepictor.cModeInflateToHighResAVBL) != 0)
maxAVBL /= 256;
float bScaling = maxAVBL / averageBondLength;
mScaling = Math.min(bScaling, Math.min(hScaling, vScaling));
mOffsetX = view.x+view.width/2.0f - mScaling*(bounds.x+bounds.width/2.0f);
mOffsetY = view.y+view.height/2.0f - mScaling*(bounds.y+bounds.height/2.0f);
}
}
else if ((mode & AbstractDepictor.cModeInflateToMaxAVBL) != 0) {
float maxAVBL = ((mode & AbstractDepictor.cModeMaxBondLength) != 0) ?
mode & AbstractDepictor.cModeMaxBondLength : AbstractDepictor.cOptAvBondLen;
mScaling = maxAVBL / averageBondLength;
}
}
public void clear() {
mOffsetX = 0.0f;
mOffsetY = 0.0f;
mScaling = 1.0f;
}
public float transformX(float x) {
return x*mScaling+mOffsetX;
}
public float transformY(float y) {
return y*mScaling+mOffsetY;
}
public float getScaling() {
return mScaling;
}
public float getOffsetX()
{
return mOffsetX;
}
public float getOffsetY()
{
return mOffsetY;
}
public void move(float dx, float dy) {
mOffsetX += dx;
mOffsetY += dy;
}
public void setScaling(float scale) {
mScaling = scale;
}
public boolean isVoidTransformation() {
return (mScaling == 1.0 && mOffsetX == 0.0 && mOffsetY == 0.0);
}
public void applyTo(DepictorTransformation t) {
t.mScaling *= mScaling;
t.mOffsetX = t.mOffsetX * mScaling + mOffsetX;
t.mOffsetY = t.mOffsetY * mScaling + mOffsetY;
}
public void applyTo(Point2D.Float p) {
p.x = p.x * mScaling + mOffsetX;
p.y = p.y * mScaling + mOffsetY;
}
public void applyTo(Rectangle2D.Float r) {
r.x = r.x * mScaling + mOffsetX;
r.y = r.y * mScaling + mOffsetY;
r.width *= mScaling;
r.height *= mScaling;
}
public void applyTo(Molecule m) {
m.scaleCoords(mScaling);
m.translateCoords(mOffsetX, mOffsetY);
}
public void applyTo(AbstractDrawingObject o) {
o.scale(mScaling);
o.move(mOffsetX, mOffsetY);
}
public DepictorTransformation getInverseTransformation() {
DepictorTransformation t = new DepictorTransformation();
t.mScaling = 1.0f / mScaling;
t.mOffsetX = -mOffsetX / mScaling;
t.mOffsetY = -mOffsetY / mScaling;
return t;
}
public String toString() {
return "DepictorTransformation Offset: " + mOffsetX +"," + mOffsetY + " Scaling: " + mScaling;
}
}
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