mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-08-23 05:40:44 +02:00
166 lines
3.7 KiB
JavaScript
166 lines
3.7 KiB
JavaScript
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function Transition ( sceneA, sceneB ) {
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this.scene = new THREE.Scene();
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this.cameraOrtho = new THREE.OrthographicCamera(window.innerWidth / -2, window.innerWidth / 2, window.innerHeight / 2, window.innerHeight / -2, -10, 10);
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this.textures = [];
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for (var i = 0; i < 6; i ++)
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this.textures[i] = new THREE.ImageUtils.loadTexture('textures/transition/transition' + (i + 1) + '.png');
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this.quadmaterial = new THREE.ShaderMaterial({
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uniforms: {
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tDiffuse1: {
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type: "t",
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value: null
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},
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tDiffuse2: {
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type: "t",
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value: null
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},
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mixRatio: {
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type: "f",
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value: 0.0
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},
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threshold: {
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type: "f",
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value: 0.1
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},
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useTexture: {
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type: "i",
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value: 1,
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},
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tMixTexture: {
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type: "t",
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value: this.textures[0]
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}
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},
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vertexShader: [
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"varying vec2 vUv;",
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"void main() {",
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"vUv = vec2( uv.x, uv.y );",
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"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
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"}"
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].join("\n"),
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fragmentShader: [
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"uniform float mixRatio;",
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"uniform sampler2D tDiffuse1;",
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"uniform sampler2D tDiffuse2;",
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"uniform sampler2D tMixTexture;",
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"uniform int useTexture;",
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"uniform float threshold;",
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"varying vec2 vUv;",
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"void main() {",
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"vec4 texel1 = texture2D( tDiffuse1, vUv );",
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"vec4 texel2 = texture2D( tDiffuse2, vUv );",
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"if (useTexture==1) {",
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"vec4 transitionTexel = texture2D( tMixTexture, vUv );",
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"float r = mixRatio * (1.0 + threshold * 2.0) - threshold;",
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"float mixf=clamp((transitionTexel.r - r)*(1.0/threshold), 0.0, 1.0);",
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"gl_FragColor = mix( texel1, texel2, mixf );",
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"} else {",
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"gl_FragColor = mix( texel2, texel1, mixRatio );",
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"}",
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"}"
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].join("\n")
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});
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quadgeometry = new THREE.PlaneBufferGeometry(window.innerWidth, window.innerHeight);
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this.quad = new THREE.Mesh(quadgeometry, this.quadmaterial);
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this.scene.add(this.quad);
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// Link both scenes and their FBOs
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this.sceneA = sceneA;
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this.sceneB = sceneB;
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this.quadmaterial.uniforms.tDiffuse1.value = sceneA.fbo;
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this.quadmaterial.uniforms.tDiffuse2.value = sceneB.fbo;
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this.needChange = false;
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this.setTextureThreshold = function ( value ) {
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this.quadmaterial.uniforms.threshold.value = value;
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}
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this.useTexture = function ( value ) {
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this.quadmaterial.uniforms.useTexture.value = value ? 1 : 0;
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}
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this.setTexture = function ( i ) {
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this.quadmaterial.uniforms.tMixTexture.value = this.textures[i];
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}
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this.render = function( delta ) {
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// Transition animation
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if (transitionParams.animateTransition)
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{
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var t = (1 + Math.sin(transitionParams.transitionSpeed * clock.getElapsedTime() / Math.PI)) / 2;
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transitionParams.transition = THREE.Math.smoothstep(t, 0.3, 0.7);
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// Change the current alpha texture after each transition
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if (transitionParams.loopTexture && (transitionParams.transition == 0 || transitionParams.transition == 1))
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{
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if (this.needChange)
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{
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transitionParams.texture = (transitionParams.texture + 1)%this.textures.length;
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this.quadmaterial.uniforms.tMixTexture.value = this.textures[transitionParams.texture];
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this.needChange = false;
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}
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}
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else
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this.needChange = true;
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}
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this.quadmaterial.uniforms.mixRatio.value = transitionParams.transition;
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// Prevent render both scenes when it's not necessary
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if (transitionParams.transition == 0) {
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this.sceneB.render( delta, false );
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} else if (transitionParams.transition == 1) {
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this.sceneA.render( delta, false );
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} else {
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// When 0<transition<1 render transition between two scenes
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this.sceneA.render( delta, true );
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this.sceneB.render( delta, true );
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renderer.render( this.scene, this.cameraOrtho, null, true );
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}
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}
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}
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