/
stretchyman.js
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/
stretchyman.js
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var stretchymanDemo = function(canvas, bgColor) {
var COLOR_INNER = new spine.Color(0.8, 0, 0, 0.5);
var COLOR_OUTER = new spine.Color(0.8, 0, 0, 0.8);
var COLOR_INNER_SELECTED = new spine.Color(0.0, 0, 0.8, 0.5);
var COLOR_OUTER_SELECTED = new spine.Color(0.0, 0, 0.8, 0.8);
var canvas, gl, renderer, input, assetManager;
var skeleton, bounds, state;
var timeKeeper, loadingScreen;
var target = null;
var hoverTargets = [];
var controlBones = [
"back leg controller",
"front leg controller",
"back arm controller",
"front arm controller",
"head controller",
"hip controller"
];
var coords = new spine.webgl.Vector3(), temp = new spine.webgl.Vector3(), temp2 = new spine.Vector2(), temp3 = new spine.webgl.Vector3();
var kneePos = new spine.Vector2();
var playButton, timeLine, spacing, isPlaying = true, playTime = 0;
var DEMO_NAME = "StretchymanDemo";
if (!bgColor) bgColor = new spine.Color(235 / 255, 239 / 255, 244 / 255, 1);
function init () {
canvas.width = canvas.clientWidth; canvas.height = canvas.clientHeight;
gl = canvas.ctx.gl;
renderer = new spine.webgl.SceneRenderer(canvas, gl);
assetManager = spineDemos.assetManager;
var textureLoader = function(img) { return new spine.webgl.GLTexture(gl, img); };
input = new spine.webgl.Input(canvas);
assetManager.loadTexture(DEMO_NAME, textureLoader, "atlas2.png");
assetManager.loadText(DEMO_NAME, "atlas2.atlas");
assetManager.loadJson(DEMO_NAME, "demos.json");
timeKeeper = new spine.TimeKeeper();
}
function loadingComplete () {
var atlas = new spine.TextureAtlas(assetManager.get(DEMO_NAME, "atlas2.atlas"), function(path) {
return assetManager.get(DEMO_NAME, path);
});
var atlasLoader = new spine.AtlasAttachmentLoader(atlas);
var skeletonJson = new spine.SkeletonJson(atlasLoader);
var skeletonData = skeletonJson.readSkeletonData(assetManager.get(DEMO_NAME, "demos.json").stretchyman);
skeleton = new spine.Skeleton(skeletonData);
skeleton.setToSetupPose();
skeleton.updateWorldTransform();
var offset = new spine.Vector2();
bounds = new spine.Vector2();
skeleton.getBounds(offset, bounds, []);
for (var i = 0; i < controlBones.length; i++) hoverTargets.push(null);
state = new spine.AnimationState(new spine.AnimationStateData(skeleton.data));
state.setAnimation(0, "idle", true);
renderer.camera.position.x = offset.x + bounds.x / 2;
renderer.camera.position.y = offset.y + bounds.y / 2;
renderer.skeletonDebugRenderer.drawMeshHull = false;
renderer.skeletonDebugRenderer.drawMeshTriangles = false;
setupUI();
setupInput();
}
function setupUI() {
var checkbox = $("#stretchyman-drawbones");
renderer.skeletonDebugRenderer.drawPaths = false;
renderer.skeletonDebugRenderer.drawBones = false;
checkbox.change(function() {
renderer.skeletonDebugRenderer.drawPaths = this.checked;
renderer.skeletonDebugRenderer.drawBones = this.checked;
});
}
function setupInput (){
input.addListener({
down: function(x, y) {
for (var i = 0; i < controlBones.length; i++) {
var bone = skeleton.findBone(controlBones[i]);
renderer.camera.screenToWorld(coords.set(x, y, 0), canvas.width, canvas.height);
if (temp.set(skeleton.x + bone.worldX, skeleton.y + bone.worldY, 0).distance(coords) < 30) {
target = bone;
}
}
},
up: function(x, y) {
target = null;
},
dragged: function(x, y) {
if (target != null) {
renderer.camera.screenToWorld(coords.set(x, y, 0), canvas.width, canvas.height);
if (target.parent !== null)
target.parent.worldToLocal(temp2.set(coords.x - skeleton.x, coords.y - skeleton.y));
else
temp2.set(coords.x - skeleton.x, coords.y - skeleton.y);
target.x = temp2.x;
target.y = temp2.y;
if (target.data.name === "head controller") {
var hipControl = skeleton.findBone("hip controller");
target.x = spine.MathUtils.clamp(target.x, -65, 65);
target.y = Math.max(260, target.y);
}
}
},
moved: function (x, y) {
for (var i = 0; i < controlBones.length; i++) {
var bone = skeleton.findBone(controlBones[i]);
renderer.camera.screenToWorld(coords.set(x, y, 0), canvas.width, canvas.height);
if (temp.set(skeleton.x + bone.worldX, skeleton.y + bone.worldY, 0).distance(coords) < 30) {
hoverTargets[i] = bone;
} else {
hoverTargets[i] = null;
}
}
}
});
}
function center (middleBone, hipBone, footBone, amount, dir) {
temp.set(footBone.worldX + skeleton.x, footBone.worldY + skeleton.y, 0)
.sub(temp3.set(hipBone.worldX + skeleton.x, hipBone.worldY + skeleton.y, 0));
var dist = Math.sqrt(temp.x * temp.x + temp.y * temp.y);
temp3.set(hipBone.worldX + skeleton.x, hipBone.worldY + skeleton.y, 0);
temp.scale(0.5).add(temp3);
middleBone.parent.worldToLocal(kneePos.set(temp.x, temp.y));
middleBone.x = kneePos.x;
middleBone.y = kneePos.y;
middleBone.children[0].y = (22 + Math.max(0, amount - dist * 0.3)) * dir;
}
function rotate (handBone, elbowBone) {
// can do all this in world space cause handBone is essentially in world space
var v = coords.set(handBone.worldX, handBone.worldY, 0).sub(new spine.webgl.Vector3(elbowBone.worldX, elbowBone.worldY, 0)).normalize();
var angle = Math.acos(v.x) * spine.MathUtils.radiansToDegrees + 180;
if (v.y < 0) angle = 360 - angle;
handBone.rotation = angle;
}
function render () {
timeKeeper.update();
var delta = timeKeeper.delta;
state.update(delta);
state.apply(skeleton);
center(skeleton.findBone("back leg middle"), skeleton.findBone("back leg 1"), skeleton.findBone("back leg controller"), 65, 1);
center(skeleton.findBone("front leg middle"), skeleton.findBone("front leg 1"), skeleton.findBone("front leg controller"), 65, 1);
center(skeleton.findBone("front arm middle"), skeleton.findBone("front arm 1"), skeleton.findBone("front arm controller"), 90, -1);
center(skeleton.findBone("back arm middle"), skeleton.findBone("back arm 1"), skeleton.findBone("back arm controller"), 90, -1);
rotate(skeleton.findBone("front arm controller"), skeleton.findBone("front arm elbow"));
rotate(skeleton.findBone("back arm controller"), skeleton.findBone("back arm elbow"));
var headControl = skeleton.findBone("head controller"), hipControl = skeleton.findBone("hip controller")
var head = skeleton.findBone("head");
var angle = Math.atan2(headControl.worldY - hipControl.worldY, headControl.worldX - hipControl.worldX) * spine.MathUtils.radDeg;
angle = (angle - 90) * 2.5;
head.rotation = head.data.rotation + Math.min(90, Math.abs(angle)) * Math.sign(angle);
skeleton.updateWorldTransform();
renderer.camera.viewportWidth = bounds.x * 1.2;
renderer.camera.viewportHeight = bounds.y * 1.5;
renderer.resize(spine.webgl.ResizeMode.Fit);
gl.clearColor(bgColor.r, bgColor.g, bgColor.b, bgColor.a);
gl.clear(gl.COLOR_BUFFER_BIT);
renderer.begin();
renderer.drawSkeleton(skeleton, true);
renderer.drawSkeletonDebug(skeleton, false, ["root"]);
gl.lineWidth(2);
for (var i = 0; i < controlBones.length; i++) {
var bone = skeleton.findBone(controlBones[i]);
var colorInner = hoverTargets[i] !== null ? spineDemos.HOVER_COLOR_INNER : spineDemos.NON_HOVER_COLOR_INNER;
var colorOuter = hoverTargets[i] !== null ? spineDemos.HOVER_COLOR_OUTER : spineDemos.NON_HOVER_COLOR_OUTER;
renderer.circle(true, skeleton.x + bone.worldX, skeleton.y + bone.worldY, 20, colorInner);
renderer.circle(false, skeleton.x + bone.worldX, skeleton.y + bone.worldY, 20, colorOuter);
}
renderer.end();
gl.lineWidth(1);
}
stretchymanDemo.loadingComplete = loadingComplete;
stretchymanDemo.render = render;
stretchymanDemo.DEMO_NAME = DEMO_NAME;
init();
};