Processing实现GameofLife
2017-01-13
这是在Processing官网上找到的一个例子：A Processing implementation of Game of Life
程序源代码：
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// Size of cells int cellSize = 5; // How likely for a cell to be alive at start (in percentage) float probabilityOfAliveAtStart = 15; // Variables for timer int interval = 100; int lastRecordedTime = 0; // Colors for active/inactive cells color alive = color(0, 200, 0); color dead = color(0); // Array of cells int[][] cells; // Buffer to record the state of the cells and use this while changing the others in the interations int[][] cellsBuffer; // Pause boolean pause = false; void setup() { size (640, 360); // Instantiate arrays cells = new int[width/cellSize][height/cellSize]; cellsBuffer = new int[width/cellSize][height/cellSize]; // This stroke will draw the background grid stroke(48); noSmooth(); // Initialization of cells for (int x=0; x<width/cellSize; x++) { for (int y=0; y<height/cellSize; y++) { float state = random (100); if (state > probabilityOfAliveAtStart) { state = 0; } else { state = 1; } cells[x][y] = int(state); // Save state of each cell } } background(0); // Fill in black in case cells don't cover all the windows } void draw() { //Draw grid for (int x=0; x<width/cellSize; x++) { for (int y=0; y<height/cellSize; y++) { if (cells[x][y]==1) { fill(alive); // If alive } else { fill(dead); // If dead } rect (x*cellSize, y*cellSize, cellSize, cellSize); } } // Iterate if timer ticks if (millis()-lastRecordedTime>interval) { if (!pause) { iteration(); lastRecordedTime = millis(); } } // Create new cells manually on pause if (pause && mousePressed) { // Map and avoid out of bound errors int xCellOver = int(map(mouseX, 0, width, 0, width/cellSize)); xCellOver = constrain(xCellOver, 0, width/cellSize-1); int yCellOver = int(map(mouseY, 0, height, 0, height/cellSize)); yCellOver = constrain(yCellOver, 0, height/cellSize-1); // Check against cells in buffer if (cellsBuffer[xCellOver][yCellOver]==1) { // Cell is alive cells[xCellOver][yCellOver]=0; // Kill fill(dead); // Fill with kill color } else { // Cell is dead cells[xCellOver][yCellOver]=1; // Make alive fill(alive); // Fill alive color } } else if (pause && !mousePressed) { // And then save to buffer once mouse goes up // Save cells to buffer (so we opeate with one array keeping the other intact) for (int x=0; x<width/cellSize; x++) { for (int y=0; y<height/cellSize; y++) { cellsBuffer[x][y] = cells[x][y]; } } } } void iteration() { // When the clock ticks // Save cells to buffer (so we opeate with one array keeping the other intact) for (int x=0; x<width/cellSize; x++) { for (int y=0; y<height/cellSize; y++) { cellsBuffer[x][y] = cells[x][y]; } } // Visit each cell: for (int x=0; x<width/cellSize; x++) { for (int y=0; y<height/cellSize; y++) { // And visit all the neighbours of each cell int neighbours = 0; // We'll count the neighbours for (int xx=x-1; xx<=x+1;xx++) { for (int yy=y-1; yy<=y+1;yy++) { if (((xx>=0)&&(xx<width/cellSize))&&((yy>=0)&&(yy<height/cellSize))) { // Make sure you are not out of bounds if (!((xx==x)&&(yy==y))) { // Make sure to to check against self if (cellsBuffer[xx][yy]==1){ neighbours ++; // Check alive neighbours and count them } } // End of if } // End of if } // End of yy loop } //End of xx loop // We've checked the neigbours: apply rules! if (cellsBuffer[x][y]==1) { // The cell is alive: kill it if necessary if (neighbours < 2 || neighbours > 3) { cells[x][y] = 0; // Die unless it has 2 or 3 neighbours } } else { // The cell is dead: make it live if necessary if (neighbours == 3 ) { cells[x][y] = 1; // Only if it has 3 neighbours } } // End of if } // End of y loop } // End of x loop } // End of function void keyPressed() { if (key=='r' || key == 'R') { // Restart: reinitialization of cells for (int x=0; x<width/cellSize; x++) { for (int y=0; y<height/cellSize; y++) { float state = random (100); if (state > probabilityOfAliveAtStart) { state = 0; } else { state = 1; } cells[x][y] = int(state); // Save state of each cell } } } if (key==' ') { // On/off of pause pause = !pause; } if (key=='c' || key == 'C') { // Clear all for (int x=0; x<width/cellSize; x++) { for (int y=0; y<height/cellSize; y++) { cells[x][y] = 0; // Save all to zero } } } } |
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