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var container, stats;
var camera, controls, scene, renderer;
var mesh, texture, material;
//FIXME experiment with these fixed params
var worldWidth = 256, worldDepth = 256, worldHalfWidth = worldWidth / 2, worldHalfDepth = worldDepth / 2;
var textureFile = 'img/Texture.jpg';
var heightmapFile = 'img/Heightmap.jpg';
var pos_x, pos_y, pos_z, rot_x, rot_y, rot_z;
var wf = false;
function runWebGLSimulation(){
//Detect WebGL
if (!Detector.webgl) {
Detector.addGetWebGLMessage();
document.getElementById('container').innerHTML = "";
}
//Start Graphics
initGraphics(textureFile, heightmapFile, function(){ animate() });
//Start Scene Animation
}
function initGraphics(textureFile, heightmapFile, cb) {
container = document.getElementById('container');
//Set camera
camera = new THREE.PerspectiveCamera(60, window.innerWidth / window.innerHeight, 1, 20000);
//Set scene
scene = new THREE.Scene();
//Get heightmap data
//Generates the heightmap data from the heightmap image
var size = worldWidth * worldDepth, data = new Float32Array(size);
var canvas = document.createElement('canvas');
canvas.width = worldWidth;
canvas.height = worldDepth;
context = canvas.getContext('2d');
context.fillStyle = '#000';
context.fillRect(0, 0, worldWidth, worldDepth);
var img = new Image();
img.src = heightmapFile;
img.onerror = function() {
alert("The following url did not work: \n"+heightmapFile.slice(15));
is_generating = false;
toggle_background();
};
img.onload = function(){
context.drawImage(img, 0, 0);
image = context.getImageData(0, 0, worldWidth, worldDepth);
var imageData = image.data;
var pixels = size;
for (var i=0; i<pixels; i++){
// Get RGB
red = imageData[4 * i + 0];
green = imageData[4 * i + 1];
blue = imageData[4 * i + 2];
// Get grayscale
gray = (red + green + blue) / 3;
// Put heightmap value
data[i] = gray;
}
//Set camera position
camera.position.y = data[worldHalfWidth + worldHalfDepth * worldWidth] + 500;
scene.add(camera);
//Create geometry data used for mesh
var geometry = new THREE.PlaneGeometry(7500, 7500, worldWidth - 1, worldDepth - 1);
for ( var i = 0, l = geometry.vertices.length; i < l; i++) {
geometry.vertices[i].position.z = data[i] * 3;
}
//Load texture
texture = THREE.ImageUtils.loadTexture(textureFile, {}, function() {
renderer.render(scene, camera);
});
texture.needsUpdate = true;
//Create mesh from heightmap and texture
material = new THREE.MeshBasicMaterial({
map : texture,
wireframe: wf
});
mesh = new THREE.Mesh(geometry, material);
mesh.rotation.x = -90 * Math.PI / 180;
scene.add(mesh);
//Create renderer
renderer = new THREE.WebGLRenderer({
preserveDrawingBuffer : true // required to support .toDataURL()
});
renderer.setSize(window.innerWidth, window.innerHeight - 150); //FIXME, add height of the controls
container.innerHTML = "";
container.appendChild(renderer.domElement);
//Get default values
pos_x = mesh.position.x;
pos_y = mesh.position.y;
pos_z = mesh.position.z;
rot_x = mesh.rotation.x;
rot_y = mesh.rotation.y;
rot_z = mesh.rotation.z;
is_generating = false;
toggle_background();
cb();
};
}
var requestId;
function loop() {
render();
requestId = window.requestAnimationFrame(loop);
}
function animate() {
if (!requestId) {
loop();
}
}
function stop_animating() {
if (requestId) {
window.cancelAnimationFrame(requestId);
requestId = undefined;
}
}
function render() {
renderer.render(scene, camera);
}
function init_controls2(){
var listener = new window.keypress.Listener();
listener.simple_combo("space", function() {
wf = !wf;
material.wireframe = wf;
});
listener.simple_combo("shift up", function() {
mesh.rotation.x += 0.1;
});
listener.simple_combo("shift down", function() {
mesh.rotation.x -= 0.1;
});
listener.simple_combo("shift left", function() {
mesh.rotation.z += 0.1;
});
listener.simple_combo("shift right", function() {
mesh.rotation.z -= 0.1;
});
listener.simple_combo("pageup", function() {
mesh.position.z += 150;
});
listener.simple_combo("pagedown", function() {
mesh.position.z -= 150;
});
listener.simple_combo("up",function() {
mesh.position.y += 150;
});
//Down
listener.simple_combo("down",function() {
mesh.position.y -= 150;
});
//Left
listener.simple_combo("left",function() {
mesh.position.x -= 150;
});
//Right
listener.simple_combo("right",function() {
mesh.position.x += 150;
});
//Reset
listener.simple_combo("delete",function() {
mesh.position.x = pos_x;
mesh.position.y = pos_y;
mesh.position.z = pos_z;
mesh.rotation.x = rot_x;
mesh.rotation.y = rot_y;
mesh.rotation.z = rot_z;
});
}
function init_controls(){
//{{{init controls
//Toggle wire-frame
shortcut.add("Space",function() {
wf = !wf;
material.wireframe = wf;
});
//Rotate Up
shortcut.add("Shift+Up",function() {
mesh.rotation.x += 0.1;
});
//Rotate Down
shortcut.add("Shift+Down",function() {
mesh.rotation.x -= 0.1;
});
//Rotate Left
shortcut.add("Shift+Left",function() {
mesh.rotation.z += 0.1;
});
//Rotate Right
shortcut.add("Shift+Right",function() {
mesh.rotation.z -= 0.1;
});
//Zoom In
shortcut.add("Page_up",function() {
mesh.position.z += 150;
});
//Zoom Out
shortcut.add("Page_down",function() {
mesh.position.z -= 150;
});
//Up
shortcut.add("Up",function() {
mesh.position.y += 150;
});
//Down
shortcut.add("Down",function() {
mesh.position.y -= 150;
});
//Left
shortcut.add("Left",function() {
mesh.position.x -= 150;
});
//Right
shortcut.add("Right",function() {
mesh.position.x += 150;
});
//Reset
shortcut.add("Delete",function() {
mesh.position.x = pos_x;
mesh.position.y = pos_y;
mesh.position.z = pos_z;
mesh.rotation.x = rot_x;
mesh.rotation.y = rot_y;
mesh.rotation.z = rot_z;
});
//}}}
}
window.onload= function(e){
runWebGLSimulation();
init_controls2();
}
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