 |
Author |
Topic: RealTime blur (well on my computer attleast) (Read 2198 times) |
|
Mathatan
|
RealTime blur (well on my computer attleast)
« on: Jun 19th, 2003, 2:12pm » |
|
Hiya!
I was practising the use of Proce55ing and made a quite fast blurring method.
Because I wanted to get the method work as fast as it could (for realtime purposes) I left the masking and filters out. Alltough I did make another method, which is a bit more thorough.
Anyway heres the method:
void blurFast(int startX, int startY, int sizeX, int sizeY, int sampleSize, int sampleDensity, int iteration, boolean borders)
{
int stopX=startX+sizeX;
int stopY=startY+sizeY;
int[] colors = new int[4];
color fcolor;
int locationX=0, locationY=0, foo=0;
int[] npixels= new int[screenX*screenY];
System.arraycopy(pixels, 0, npixels, 0, screenX*screenY);
if(sampleSize/sampleDensity>1) sampleSize/=sampleDensity;
while(iteration-->0) {
for(int pixX=startX; pixX<stopX; pixX++)
for(int pixY=startY; pixY<stopY; pixY++)
{
if(pixX>screenX) foo=screenX*(pixY-1)+(pixX-iteration);
else foo=screenX*(pixY)+(pixX-iteration);
colors[0]=0; colors[1]=0; colors[2]=0; colors[3]=0;
for(int i=-(sampleSize+1/2)*sampleDensity; i<(sampleSize+1/2)*sampleDensity; i+=sampleDensity)
for(int j=-(sampleSize+1/2)*sampleDensity; j<(sampleSize+1/2)*sampleDensity; j+=sampleDensity)
{
locationX=pixX+i;
locationY=pixY+j;
if(locationX>=screenX) locationX-=screenX;
if(locationY>=screenY) locationY-=screenY;
fcolor=getPixel(locationX, locationY);
colors[0]+=red(fcolor); colors[1]+=green(fcolor); colors[2]+=blue(fcolor); colors[3]++;
}
npixels[foo]=color(colors[0]/colors[3], colors[1]/colors[3], colors[2]/colors[3]);
}
System.arraycopy(npixels, 0, pixels, 0, screenX*screenY);
}
if(borders) {
drawLine(startX, startY+1, 0, sizeX+1);
drawLine(startX, startY+1+sizeY, 0, sizeX+1);
drawLine(startX+1, startY, 90, sizeY+1);
drawLine(startX+1+sizeX, startY, 90, sizeY+1);
}
}
void drawLine(int startX, int startY, float rotation, int length)
{
int endX=1, endY=1;
float rotX=1*cos(radians(rotation)), rotY=1*sin(radians(rotation));
for(int i=1; i<=length; i++) {
endX=int(startX+(rotX*i))%screenX;
endY=int(startY+(rotY*i))%screenY;
if(endX<0) endX+=screenX;
if(endY<0) endY+=screenY;
point(endX, endY);
}
}
If you're interested to see it on action (with some other stuff also) check http://koti.mbnet.fi/mathatan/temp/WIP/Java/RealTimeBlur/
If you have got any suggestions or improvement (as I'm just a beginner) please let me know..
|
| « Last Edit: Jun 19th, 2003, 3:50pm by Mathatan » |
|
|
|
|
|
