CMWorks.github.io/boxTerrain.html at master · CMWorks/CMWorks.github.io · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0>
    <style> body {padding: 0; margin: 0;} </style>
	<script language="javascript" type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.6.0/p5.min.js"></script>
    <script language="javascript" type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.6.0/addons/p5.dom.min.js"></script>
    <script>

    var scl = 30;
    var col, row;
    var w = 2500;
    var h = 2500;
    var terrain = [];
    var Random = 18;  //abs of number, 0==no radom, 10==more random, 100==realy random
    var xOff = 0;
    var yOff = 0;
    var zOff = 0;
    var speedSlider,sensitivitySlider,button;
    var speed = 10;
    var sensitivity = 3;
    var img;

    function preload() {
      //img = loadImage('http://localhost:8080/p5_work/sky.png');
    }

    function setup() {
      createCanvas(1400, 800, WEBGL);
      angleMode(RADIANS);

      col = w/scl;
      row = h/scl;

      button = createButton('reset');
      button.mousePressed(reset);
      speedSlider = createSlider(0,50,10,1);
      sensitivitySlider = createSlider(0,5,3,.1);

      let preX = 0;
      let preY = 0;
      for (var x = 0; x < col; x++) {
        terrain[x] = [];
        for (var y = 0; y < row; y++) {
          if(x!==0)
            preX = terrain[x-1][y];
          else if(y!==0)
            preX = terrain[x][y-1];
          if(y!==0)
            preY=terrain[x][y-1];
          else
            preY=preX;
          terrain[x][y] = random((preX+preY)/2-(Random),(preX+preY)/2+(Random));
        }
      }
    }

    function draw() {
      speed = speedSlider.value();
      sensitivity = sensitivitySlider.value();
      X = (winMouseY/sensitivity)*(PI/180);
      Z = (winMouseX/sensitivity)*(PI/180);
      keyEvent(X,Z);

      background(0);
      //texture(img);
      sphere(5000);
      rotateX(X);
      rotateZ(Z);
      gravity();
      translate(-w/2+xOff, -h/2+yOff,-zOff);
      for( var y = 0; y < row; y++){
        beginShape(TRIANGLE_STRIP);
        for( var x = 0; x < col; x++){
          fill(Math.abs(terrain[x][y]*2),terrain[x][y]-100,terrain[x][y]*+100);
          vertex(x*scl, y*scl, terrain[x][y]);
          vertex(x*scl, (y+1)*scl, terrain[x][y+1]);
        }
        endShape();
      }
      drawGrid();
      drawPlayer();

    }

    function drawGrid(){
      push();
        translate(w/2,h/2,2);
        push();
          fill(255);
          translate(-75,0);
          box(150,10,10);
          fill('red');
          translate(150,0);
          box(150,10,10);
        pop();
        push();
          fill('green');
          translate(0,-75);
          box(10,150,10);
          fill(255);
          translate(0,150);
          box(10,150,10);
        pop();
        push();
          fill(255);
          translate(0,0,-75);
          box(10,10,150);
          fill('blue');
          translate(0,0,150);
          box(10,10,150);
        pop();
      pop();
    }

    function keyEvent(X,Z){
      if(key=='w'){
        xOff += Math.sin(Z) * speed;
        yOff += Math.cos(Z) * speed;
        xOff += 1;
      }else if(key=='s'){
        xOff -= Math.sin(Z) * speed;
        yOff -= Math.cos(Z) * speed;
      }else if(key=='a'){
        xOff += Math.sin(Z + PI/2) *speed;
        yOff += Math.cos(Z + PI/2) *speed;
      }else if(key=='d'){
        xOff += Math.sin(Z - PI/2) *speed;
        yOff += Math.cos(Z - PI/2) *speed;
      }else if(keyIsDown(UP_ARROW)){
        zOff +=speed;
      }else if(keyIsDown(DOWN_ARROW)){
        zOff -=speed;
      }else if(keyCode == 32){
        zOff += 15;
      }
    }

    function mouseWheel(event) {
      scl+= event.delta/99
    }

    function reset(){
      xOff=0;
      yOff=0;
      zOff=0;
      scl=20;
    }

    function drawPlayer(){
      camera(0, 0, 1, 0, 0, 0, 0, 1, 0);
    }

    function gravity(){
      x = Math.floor(col/2+xOff/scl);
      y = Math.floor(row/2+yOff/scl);
        if(zOff>-terrain[x][y]+scl*3)
          zOff-=9;
        else
            zOff = -terrain[x][y]+scl*3;
    }

    </script>
  </head>
  <body>
  </body>
</html>