I load an Image via Texture
texture = new Texture("badlogic.jpg");
texture2 = new Texture("badlogic2.png");
image=new Image(texture);
stage.addActor(image);
or TextureRegion
texture = new Texture("badlogic.jpg");
regions=new TextureRegion[2];
regions[0]=new TextureRegion(texture, 0, 0, 64, 64);
regions[1]=new TextureRegion(texture, 0, 63, 64, 64);
image=new Image(regions[0]);
stage.addActor(image);
Now, I want to change the image to texture2 or regions[1]. How can I do that?
Related
I want to change the color of a bitmap that should be filled in an area. The color must be variable so it is no solution to use pngs in different colors. ;-)
That's the code that did not work. The png will be used but not with the color change.
var bd = new createjs.Bitmap( "high_.png" );
bd.image.onload = function(){
bd.filters = [new createjs.ColorFilter(0, 0, 0, 1, 0, 0, 255, 0)];
bd.cache(-50, -50, 50, 50);
myclip_mc.graphics.beginBitmapFill( bd.image );
myclip_mc.graphics.moveTo(...
...
}
I also tried it by using the following code, but I found no solution to change the color of the png. :-(
var bd = new Image();
bd.src = "high_.png";
bd.image.onload = function(){
myclip_mc.graphics.beginBitmapFill( bd );
myclip_mc.graphics.moveTo(...
...
Any ideas?
I don't understand why I only see half of crate. I recall that it happened to me before, with other graphics pipelines.
Here is the fiddle link: https://jsfiddle.net/20azohgc/10/
Here is the code:
//Basic THREE setup:
const canvas = document.getElementById("canvasThree");
const scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera(45, 1, 1, 500);
camera.position.set( 0, 0, 100 );
camera.lookAt( new THREE.Vector3( 0, 0, 0 ));
camera.position.set( 0, 0, 100 )
camera.lookAt( new THREE.Vector3( 0, 0, 0 ) )
const renderer = new THREE.WebGLRenderer({ canvas });
const light = new THREE.PointLight(0xFFFFFF);
light.position.set(0, 1, 2);
scene.add(light);
var texture = new THREE.TextureLoader().load( "https://raw.githubusercontent.com/mrdoob/three.js/master/examples/textures/crate.gif" );
var material = new THREE.MeshBasicMaterial({ color: "white", map: texture });
const pos = new Float32Array([0, 0, 0, 0, 10, 0, 10, 10, 0, 0, 0, 0, 10, 0, 0, 10, 10, 0]);
const nrm = new Float32Array([0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1]);
const tex = new Float32Array([0,0, 1,0, 1,1, 0,0, 0,1, 1,1]);
const geo = new THREE.BufferGeometry();
geo.addAttribute("position", new THREE.BufferAttribute(pos, 3));
geo.addAttribute("normal", new THREE.BufferAttribute(nrm, 3));
geo.addAttribute("uv", new THREE.BufferAttribute(tex, 2));
//This is a drawing group, each square is 6 indices (2 triangles with 3 vertices each).
geo.addGroup(0 ,6,0);
const mesh = new THREE.Mesh(geo, [material]);
mesh.position.set(-2,-0.5,0);
scene.add(mesh);
function update(){
scene.rotation.y = 0.25 * Math.cos(performance.now() * 0.001)
renderer.render(scene, camera);
requestAnimationFrame(update);
}
update();
I'm having a problem trying to write a unit test to check collision detection. I simplify code as only this possible - I have a plane in (0, 0, 0) and I do raycasting from above this plane (from (0, 100, 0)) to bottom (0, -1, 0) and I suppose to find intersections with that plane but no luck.
console.clear();
var intersections,
from = new THREE.Vector3(0, 100, 0);
direction = new THREE.Vector3(0, -1, 0),
raycaster = new THREE.Raycaster();
var geometry = new THREE.PlaneGeometry(10, 10, 1, 1);
var ground = new THREE.Mesh(geometry);
ground.position.set(0, 0, 0);
ground.rotation.x = THREE.Math.degToRad(-90);
raycaster.set(from, direction);
intersections = raycaster.intersectObjects([ground]);
console.log(intersections);
What is wrong here? Why this simple code does not show any intersections? (r73).
jsfiddle example
You need to update the world transform of the ground mesh prior to raycasting. (Normally, the renderer does this for your in the render() call.)
console.clear();
var intersections,
from = new THREE.Vector3(0, 100, 0);
direction = new THREE.Vector3(0, -1, 0),
raycaster = new THREE.Raycaster();
var geometry = new THREE.PlaneGeometry(10, 10, 1, 1);
var ground = new THREE.Mesh(geometry);
ground.position.set(0, 0, 0);
ground.rotation.x = THREE.Math.degToRad(-90);
ground.updateMatrixWorld(); // add this
raycaster.set(from, direction);
intersections = raycaster.intersectObjects([ground]);
console.log(intersections);
three.js r.73
I'm having difficulties constructing a hollow cylinder in Three.js.
Should I go and construct it using CSG or by stitching the vertices together?
var extrudeSettings = {
amount : 2,
steps : 1,
bevelEnabled: false,
curveSegments: 8
};
var arcShape = new THREE.Shape();
arcShape.absarc(0, 0, 1, 0, Math.PI * 2, 0, false);
var holePath = new THREE.Path();
holePath.absarc(0, 0, 0.8, 0, Math.PI * 2, true);
arcShape.holes.push(holePath);
var geometry = new THREE.ExtrudeGeometry(arcShape, extrudeSettings);
This solution uses ChandlerPrall's ThreeCSG.js project: http://github.com/chandlerprall/ThreeCSG
(For now, I recommend using the experimental version that supports materials - the uv branch - http://github.com/chandlerprall/ThreeCSG/tree/uvs)
Here's the code you will need:
// Cylinder constructor parameters:
// radiusAtTop, radiusAtBottom, height, segmentsAroundRadius, segmentsAlongHeight
var smallCylinderGeom = new THREE.CylinderGeometry( 30, 30, 80, 20, 4 );
var largeCylinderGeom = new THREE.CylinderGeometry( 40, 40, 80, 20, 4 );
var smallCylinderBSP = new ThreeBSP(smallCylinderGeom);
var largeCylinderBSP = new ThreeBSP(largeCylinderGeom);
var intersectionBSP = largeCylinderBSP.subtract(smallCylinderBSP);
var redMaterial = new THREE.MeshLambertMaterial( { color: 0xff0000 } );
var hollowCylinder = intersectionBSP.toMesh( redMaterial );
scene.add( hollowCylinder );
It is unlikely that you would have to stitch vertices together. If your cylinder has no thickness, you can use THREE.CylinderGeometry(). If it does have thickness, you can use CSG.
Use SVGloader to load a circle of desired radius (as an SVG). Set the geometry to ExtrudeBufferGeometry and give it your desired height as depth in the extrude settings object.
I have a little Texture2D:
myTexture = new Texture2D(GraphicsDevice, 512, 512, false, SurfaceFormat.Vector4);
when I try to draw it:
spriteBatch.Begin();
spriteBatch.Draw(myTexture, new Rectangle(0, 0, 512, 512), Color.White);
spriteBatch.End();
I get an exception:
"XNA Framework HiDef profile requires TextureFilter to be Point when using texture format Vector4."
How can I set TextureFilter to Point?
Pass SamplerState.PointClamp or SamplerState.PointWrap to SpriteBatch.Begin.