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Topic: Pixel array problems? (Read 301 times) |
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rgovostes
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Pixel array problems?
« on: Sep 9th, 2003, 9:45pm » |
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I decided to rewrite my Vine code to use a pixel array, which I read is much faster than using getPixel() and setPixel(). After a bit of work, I came up with that which is below.
However, when I run it, it produces a very strange result - the image is multiplied a couple times across the screen.
Code:// Vine v2 (Sep 09 '03)
// by Ryan Govostes
int branchX[] = new int[1];
int branchY[] = new int[1];
BImage image;
void setup() {
size(320, 240);
noBackground();
colorMode(RGB, 201);
fill(0, 0, 0);
rect(0, 0, width, height);
branchX[0] = width / 2;
branchY[0] = height / 2;
}
void loop() {
int index; color c;
image = new BImage(pixels, width, height, RGB);
for(int i = 0; i < branchX.length; i ++) {
index = (branchY[i] * image.height) + branchX[i];
c = image.pixels[index];
c = color(0, green(c) + 20, 0);
image.pixels[index] = c;
if (green(c) == 201 && branchX.length < 10) { newBranch(branchX[i], branchY[i]); }
moveRandom(i);
}
System.arraycopy(image.pixels, 0, pixels, 0, pixels.length);
}
void moveRandom(int i) {
int r = int(random(8));
if (r == 0 || r == 3 || r == 5) { branchX[i] = branchX[i] - 1; } // 012
if (r == 2 || r == 4 || r == 7) { branchX[i] = branchX[i] + 1; } // 3 4
if (r == 0 || r == 1 || r == 2) { branchY[i] = branchY[i] - 1; } // 567
if (r == 5 || r == 6 || r == 7) { branchY[i] = branchY[i] + 1; }
branchX[i] = max(branchX[i], 0); branchX[i] = min(branchX[i], width - 1);
branchY[i] = max(branchY[i], 0); branchY[i] = min(branchY[i], height - 1);
}
void newBranch(int newx, int newy) {
int tempx[] = new int[branchX.length + 1];
int tempy[] = new int[branchY.length + 1];
System.arraycopy(branchX, 0, tempx, 0, branchX.length);
System.arraycopy(branchY, 0, tempy, 0, branchY.length);
tempx[branchX.length] = newx; tempy[branchY.length] = newy;
branchX = tempx; branchY = tempy;
print("Branch " + branchX.length + " added.\n");
} |
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The effect is pretty cool though, looks like some sort of satellite scan or something.
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| « Last Edit: Sep 9th, 2003, 9:48pm by rgovostes » |
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