StackOverflow2013

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plurals

PO
primarykey
Id
20547608
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-12-12T15:34:15.237
FavoriteCount
0
LastActivityDate
2013-12-12T19:00:20.060
LastEditDate
2013-12-12T19:00:20.060
LastEditorUserId
1663265
OwnerUserId
1663265
ParentId
20530949
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
The following code successfully rotates a bitmap, thanks to reddit.com/user/dd_123! <pre><code>public void render2(int xPos, int yPos, double angle, BitMap data){ double angle2 = Math.toRadians(angle); angle = angle2; int w = data.getWidth(); int h = data.getHeight(); int size = (int) (Math.sqrt(w * w + h * h)); BitMap newBitMap = new BitMap(size, size); int xCenter = w / 2; int yCenter = h / 2; final int halfSize = size / 2; for(int y = 0; y < size; y++){ for(int x = 0; x < size; x++){ int samplePointX = x - halfSize; int samplePointY = y - halfSize; int xData, yData; xData = (int)(samplePointX * -Math.cos(angle) + samplePointY * Math.sin(angle)); yData = (int)(samplePointX * -Math.sin(angle) - samplePointY * Math.cos(angle)); xData += xCenter; yData += yCenter; if(!(xData >= 0 && xData < w)){ continue; } if(!(yData >= 0 && yData < h)){ continue; } if((x) + (y) * size > size * size){ continue; } screenPixels.setValue(x, y, data.getValue(xData, yData)); } } </code></pre> } The bitmap class <pre><code>public class BitMap { public BitMap(int width, int height){ this.width = width; this.height = height; this.data = new int[width * height]; } public BitMap(int[] data, int width, int height) { this.data = data; this.width = width; this.height = height; } private int[] data; private int width, height; public int getWidth(){ return width; } public int getHeight(){ return height; } public int getValue(int x, int y){ return data[x + y * width]; } public BitMap fillWithValues(int value){ for(int i = 0; i < data.length; i++){ data[i] = value; } return this; } public void setValue(int xScr, int yScr, int value) { data[xScr + yScr * width] = value; } public int[] getValues() { return data; } public BitMap subData(int xPos, int yPos, int w, int h) { BitMap bitmap = new BitMap(w, h); for(int y = 0; y < h; y++){ for(int x = 0; x < w; x++){ bitmap.setValue(x, y, this.getValue(x + xPos, y + yPos)); } } return bitmap; } </code></pre> }
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. PO2D rotation is leaving holes
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USthetheodor
UserOwnerUserId
1. USthetheodor
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. PO2D rotation is leaving holes
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTAcceptedByOriginator
CommentsPostId
1. This table or related slice is empty.

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