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why my splash effect look so strange? (Read 348 times)
void
why my splash effect look so strange?
May 8th, 2009, 2:23am  
I'm a new in Processing ,recently I'm trying to learn the effect but why my effect look so strange? can someone else help me?

here is my code: Code:
int[] oldBuffer,newBuffer; 
float damping =0.9; // non-integer between 0 and 1 
PImage bg; 

void setup() { 
  size(320, 200);

  oldBuffer = new int[width * height]; 
  newBuffer = new int[width * height]; 

  bg = loadImage("111.JPG"); 
  background(bg); 
} 

void draw() { 
  int[] tempBuffer = new int[width * height]; 
  boolean Changed; 

  Changed = processWater(); 
  if (Changed == true) { 
    renderWater(); 
  } 

  tempBuffer = newBuffer; 
  newBuffer = oldBuffer; 
  oldBuffer = tempBuffer; 
} 

void mousePressed() { 
  newBuffer[mouseX+mouseY*width] += 5000; 
  oldBuffer[mouseX+mouseY*width] += 5000; 
} 

boolean processWater() { 
  int  x, y,tempHeight; 
  boolean Changed = false; 
  for (x = 1; x < width-1; x ++) {
    for(y=1;y<height-1;y++){ 
	int loc=x+y*width;
	tempHeight  = oldBuffer[loc - 1] + oldBuffer[loc + 1]; 
	tempHeight += oldBuffer[loc -width] + oldBuffer[loc +width]; 
	tempHeight  = (tempHeight/2) - newBuffer[loc]; 
	tempHeight *= damping; 
	if (newBuffer[loc] != tempHeight) { 
	  Changed = true; 
	  newBuffer[loc] = tempHeight; 
	} 
    }
  } 
  return Changed; 
} 

void renderWater() { 
  int x, y, xOffset, yOffset; 
  color tempColor; 
  float shading; 
  loadPixels();
  for (x =1; x < width-1; x ++) {
    for(y=1;y<height-1;y++){ 
	int loc=x+y*width;
	xOffset = newBuffer[loc - 1] - newBuffer[loc + 1]; 
	yOffset = newBuffer[loc - width] - newBuffer[loc + width]; 
	int offsetLoc=constrain((x+xOffset)+(y+yOffset)*width,0,(width*height-1));
	tempColor = bg.pixels[offsetLoc]; 
	pixels[loc] = tempColor; 
    } 
  } 
  updatePixels();
}
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