yorikvanhavre/webgl.py

## webgl.py
import FreeCAD,WebGui

SCALE = 10 # global scale modifier

template = """<!DOCTYPE HTML>
<html lang="en">
	<head>
		<title>FreeCAD webGL viewer</title>
		<meta charset="utf-8">
		<style type="text/css">
			body {
				background-color: #888888;
				margin: 0px;
				overflow: hidden;
			}
		</style>
	</head>
	<body>

		<div id="container"></div>

		<script type="text/javascript" src="./Three.js"></script>

		<!-- FreeCAD:ShapeDefs -->

		<script type="text/javascript">
		    var camera, scene, renderer, object;
			var targetRotation = 0;
			var targetRotationOnMouseDown = 0;
			var targetRotationY = 0;
			var targetRotationYOnMouseDown = 0;
			var mouseX = 0;
			var mouseXOnMouseDown = 0;
			var mouseY = 0;
			var mouseYOnMouseDown = 0;
			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;

			init();
			setInterval( loop, 1000 / 60 );

			function init() {

				var container = document.getElementById( 'container' );

				camera = new THREE.Camera( 50, window.innerWidth / window.innerHeight, 1, 2000 );
				camera.position.z = 1000;

				scene = new THREE.Scene();
				scene.addLight( new THREE.AmbientLight( 0x0ff20 ) );
				light1 = new THREE.PointLight( 0xff0040 );
				scene.addLight( light1 );

			        <!-- FreeCAD:ShapeCreate -->

				//renderer = new THREE.CanvasRenderer();
				renderer = new THREE.WebGLRenderer();
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );
				document.addEventListener( 'mousedown', onDocumentMouseDown, false );

			}
			function onDocumentMouseDown( event ) {

							event.preventDefault();

							document.addEventListener( 'mousemove', onDocumentMouseMove, false );
							document.addEventListener( 'mouseup', onDocumentMouseUp, false );
							document.addEventListener( 'mouseout', onDocumentMouseOut, false );

							mouseXOnMouseDown = event.clientX - windowHalfX;
							mouseYOnMouseDown = event.clientY - windowHalfY;
							targetRotationOnMouseDown = targetRotation;
						}

						function onDocumentMouseMove( event ) {

							mouseX = event.clientX - windowHalfX;
							mouseY = event.clientY - windowHalfY;

							targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;
							targetRotationY = targetRotationYOnMouseDown + ( mouseY - mouseYOnMouseDown ) * 0.02;
						}

						function onDocumentMouseUp( event ) {

							document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
							document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
							document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
						}

						function onDocumentMouseOut( event ) {

							document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
							document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
							document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
						}

			function loop() {

				var time = new Date().getTime() * 0.0005;

				//object.rotation.x -= 0.005;
				//object.rotation.y -= 0.01;
				object.rotation.y += ( targetRotation - object.rotation.y ) * 0.02;
				object.rotation.x += ( targetRotationY - object.rotation.x ) * 0.02;


				renderer.render(scene, camera);

			}

		</script>
	</body>
</html>"""

def to3js(obj):
    """Converts a freecad object to three.js javascript code"""

    if not obj.isDerivedFrom("Part::Feature"):
        return ''

    # header
    js =  "var Shape" + obj.Name + " = function () {\n"
    js += "var scope = this;\n"
    js += "THREE.Geometry.call( this );\n\n"

    # create mesh
    m = obj.Shape.tessellate(1)

    # export vertices
    for v in m[0]:
        js += "v(%.4f,%.4f,%.4f);\n"%(v.x,v.y,v.z)
    js += "\n"

    # export faces
    index = 0
    for f in m[1]:
        js += "f3(%i,%i,%i);\n"%(f[0],f[1],f[2])

    # make all work
    js += "this.sortFacesByMaterial();\n"
    js += "function v( x, y, z ) {\n"
    js += "scope.vertices.push( new THREE.Vertex( new THREE.Vector3( x, y, z )  ) );\n"
    js += "}\n"
    js += "function f3( a, b, c , nx, ny, nz) {\n"
    js += "scope.faces.push( new THREE.Face3( a, b, c , nx && ny && nz ? new THREE.Vector3( nx, ny, nz ) : null ) );\n"
    js += "}\n"
    js += "}\n\n"
    js += "Shape" + obj.Name + ".prototype = new THREE.Geometry();\n"
    js += "Shape" + obj.Name + ".prototype.constructor = Shape" + obj.Name + ";"

    return js

def getHTML(objs):
    """gets an html page with the given objects"""

    shapedefs = ""
    shapecreates = ""
    for obj in objs:
        shapedefs += '<script type="text/javascript">\n' + to3js(obj) + "\n</script>\n"
        shapecreates += "object = new THREE.Mesh( new Shape" + obj.Name + "(), new THREE.MeshNormalMaterial({opacity:1,shading:THREE.SmoothShading}) );\n"
	shapecreates += "object.overdraw = true;\nobject.scale.x = object.scale.y = object.scale.z =" + str(SCALE) + ".;\nscene.addObject( object );\n"

    html = template.replace("<!-- FreeCAD:ShapeDefs -->",shapedefs)
    html = html.replace("<!-- FreeCAD:ShapeCreate -->",shapecreates)

    return html

def getObjects():
    """Returns viible objects from the active documnt"""

    objs = []
    for obj in FreeCAD.ActiveDocument.Objects:
        if obj.ViewObject.isVisible():
            objs.append(obj)

    return objs

def show():
    """Opens a webGL viewer with the scene contents"""

    html = getHTML(getObjects())
    WebGui.openBrowserHTML(html,'file://' + FreeCAD.getResourceDir() + 'Mod/Web/WebGL/','WebGL viewer')
	import FreeCAD,WebGui

	SCALE = 10 # global scale modifier

	template = """<!DOCTYPE HTML>
	<html lang="en">
	<head>
	<title>FreeCAD webGL viewer</title>
	<meta charset="utf-8">
	<style type="text/css">
	body {
	background-color: #888888;
	margin: 0px;
	overflow: hidden;
	}
	</style>
	</head>
	<body>

	<div id="container"></div>

	<script type="text/javascript" src="./Three.js"></script>

	<!-- FreeCAD:ShapeDefs -->

	<script type="text/javascript">
	var camera, scene, renderer, object;
	var targetRotation = 0;
	var targetRotationOnMouseDown = 0;
	var targetRotationY = 0;
	var targetRotationYOnMouseDown = 0;
	var mouseX = 0;
	var mouseXOnMouseDown = 0;
	var mouseY = 0;
	var mouseYOnMouseDown = 0;
	var windowHalfX = window.innerWidth / 2;
	var windowHalfY = window.innerHeight / 2;

	init();
	setInterval( loop, 1000 / 60 );

	function init() {

	var container = document.getElementById( 'container' );

	camera = new THREE.Camera( 50, window.innerWidth / window.innerHeight, 1, 2000 );
	camera.position.z = 1000;

	scene = new THREE.Scene();
	scene.addLight( new THREE.AmbientLight( 0x0ff20 ) );
	light1 = new THREE.PointLight( 0xff0040 );
	scene.addLight( light1 );

	<!-- FreeCAD:ShapeCreate -->

	//renderer = new THREE.CanvasRenderer();
	renderer = new THREE.WebGLRenderer();
	renderer.setSize( window.innerWidth, window.innerHeight );
	container.appendChild( renderer.domElement );
	document.addEventListener( 'mousedown', onDocumentMouseDown, false );

	}
	function onDocumentMouseDown( event ) {

	event.preventDefault();

	document.addEventListener( 'mousemove', onDocumentMouseMove, false );
	document.addEventListener( 'mouseup', onDocumentMouseUp, false );
	document.addEventListener( 'mouseout', onDocumentMouseOut, false );

	mouseXOnMouseDown = event.clientX - windowHalfX;
	mouseYOnMouseDown = event.clientY - windowHalfY;
	targetRotationOnMouseDown = targetRotation;
	}

	function onDocumentMouseMove( event ) {

	mouseX = event.clientX - windowHalfX;
	mouseY = event.clientY - windowHalfY;

	targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;
	targetRotationY = targetRotationYOnMouseDown + ( mouseY - mouseYOnMouseDown ) * 0.02;
	}

	function onDocumentMouseUp( event ) {

	document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
	document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
	document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
	}

	function onDocumentMouseOut( event ) {

	document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
	document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
	document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
	}

	function loop() {

	var time = new Date().getTime() * 0.0005;

	//object.rotation.x -= 0.005;
	//object.rotation.y -= 0.01;
	object.rotation.y += ( targetRotation - object.rotation.y ) * 0.02;
	object.rotation.x += ( targetRotationY - object.rotation.x ) * 0.02;


	renderer.render(scene, camera);

	}

	</script>
	</body>
	</html>"""

	def to3js(obj):
	"""Converts a freecad object to three.js javascript code"""

	if not obj.isDerivedFrom("Part::Feature"):
	return ''

	# header
	js = "var Shape" + obj.Name + " = function () {\n"
	js += "var scope = this;\n"
	js += "THREE.Geometry.call( this );\n\n"

	# create mesh
	m = obj.Shape.tessellate(1)

	# export vertices
	for v in m[0]:
	js += "v(%.4f,%.4f,%.4f);\n"%(v.x,v.y,v.z)
	js += "\n"

	# export faces
	index = 0
	for f in m[1]:
	js += "f3(%i,%i,%i);\n"%(f[0],f[1],f[2])

	# make all work
	js += "this.sortFacesByMaterial();\n"
	js += "function v( x, y, z ) {\n"
	js += "scope.vertices.push( new THREE.Vertex( new THREE.Vector3( x, y, z ) ) );\n"
	js += "}\n"
	js += "function f3( a, b, c , nx, ny, nz) {\n"
	js += "scope.faces.push( new THREE.Face3( a, b, c , nx && ny && nz ? new THREE.Vector3( nx, ny, nz ) : null ) );\n"
	js += "}\n"
	js += "}\n\n"
	js += "Shape" + obj.Name + ".prototype = new THREE.Geometry();\n"
	js += "Shape" + obj.Name + ".prototype.constructor = Shape" + obj.Name + ";"

	return js

	def getHTML(objs):
	"""gets an html page with the given objects"""

	shapedefs = ""
	shapecreates = ""
	for obj in objs:
	shapedefs += '<script type="text/javascript">\n' + to3js(obj) + "\n</script>\n"
	shapecreates += "object = new THREE.Mesh( new Shape" + obj.Name + "(), new THREE.MeshNormalMaterial({opacity:1,shading:THREE.SmoothShading}) );\n"
	shapecreates += "object.overdraw = true;\nobject.scale.x = object.scale.y = object.scale.z =" + str(SCALE) + ".;\nscene.addObject( object );\n"

	html = template.replace("<!-- FreeCAD:ShapeDefs -->",shapedefs)
	html = html.replace("<!-- FreeCAD:ShapeCreate -->",shapecreates)

	return html

	def getObjects():
	"""Returns viible objects from the active documnt"""

	objs = []
	for obj in FreeCAD.ActiveDocument.Objects:
	if obj.ViewObject.isVisible():
	objs.append(obj)

	return objs

	def show():
	"""Opens a webGL viewer with the scene contents"""

	html = getHTML(getObjects())
	WebGui.openBrowserHTML(html,'file://' + FreeCAD.getResourceDir() + 'Mod/Web/WebGL/','WebGL viewer')