EffectComposer.js 3.9 KB

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  1. /**
  2. * @author alteredq / http://alteredqualia.com/
  3. */
  4. THREE.EffectComposer = function ( renderer, renderTarget ) {
  5. this.renderer = renderer;
  6. if ( renderTarget === undefined ) {
  7. var parameters = {
  8. minFilter: THREE.LinearFilter,
  9. magFilter: THREE.LinearFilter,
  10. format: THREE.RGBAFormat,
  11. stencilBuffer: false
  12. };
  13. var size = renderer.getDrawingBufferSize();
  14. renderTarget = new THREE.WebGLRenderTarget( size.width, size.height, parameters );
  15. renderTarget.texture.name = 'EffectComposer.rt1';
  16. }
  17. this.renderTarget1 = renderTarget;
  18. this.renderTarget2 = renderTarget.clone();
  19. this.renderTarget2.texture.name = 'EffectComposer.rt2';
  20. this.writeBuffer = this.renderTarget1;
  21. this.readBuffer = this.renderTarget2;
  22. this.passes = [];
  23. // dependencies
  24. if ( THREE.CopyShader === undefined ) {
  25. console.error( 'THREE.EffectComposer relies on THREE.CopyShader' );
  26. }
  27. if ( THREE.ShaderPass === undefined ) {
  28. console.error( 'THREE.EffectComposer relies on THREE.ShaderPass' );
  29. }
  30. this.copyPass = new THREE.ShaderPass( THREE.CopyShader );
  31. this.previousFrameTime = Date.now();
  32. };
  33. Object.assign( THREE.EffectComposer.prototype, {
  34. swapBuffers: function () {
  35. var tmp = this.readBuffer;
  36. this.readBuffer = this.writeBuffer;
  37. this.writeBuffer = tmp;
  38. },
  39. addPass: function ( pass ) {
  40. this.passes.push( pass );
  41. var size = this.renderer.getDrawingBufferSize();
  42. pass.setSize( size.width, size.height );
  43. },
  44. insertPass: function ( pass, index ) {
  45. this.passes.splice( index, 0, pass );
  46. },
  47. // deltaTime value is in seconds.
  48. render: function ( deltaTime ) {
  49. if ( deltaTime == undefined )
  50. {
  51. deltaTime = (Date.now() - this.previousFrameTime) * 0.001;
  52. }
  53. this.previousFrameTime = Date.now();
  54. var maskActive = false;
  55. var pass, i, il = this.passes.length;
  56. for ( i = 0; i < il; i ++ ) {
  57. pass = this.passes[ i ];
  58. if ( pass.enabled === false ) continue;
  59. pass.render( this.renderer, this.writeBuffer, this.readBuffer, deltaTime, maskActive );
  60. if ( pass.needsSwap ) {
  61. if ( maskActive ) {
  62. var context = this.renderer.context;
  63. context.stencilFunc( context.NOTEQUAL, 1, 0xffffffff );
  64. this.copyPass.render( this.renderer, this.writeBuffer, this.readBuffer, deltaTime );
  65. context.stencilFunc( context.EQUAL, 1, 0xffffffff );
  66. }
  67. this.swapBuffers();
  68. }
  69. if ( THREE.MaskPass !== undefined ) {
  70. if ( pass instanceof THREE.MaskPass ) {
  71. maskActive = true;
  72. } else if ( pass instanceof THREE.ClearMaskPass ) {
  73. maskActive = false;
  74. }
  75. }
  76. }
  77. },
  78. reset: function ( renderTarget ) {
  79. if ( renderTarget === undefined ) {
  80. var size = this.renderer.getDrawingBufferSize();
  81. renderTarget = this.renderTarget1.clone();
  82. renderTarget.setSize( size.width, size.height );
  83. }
  84. this.renderTarget1.dispose();
  85. this.renderTarget2.dispose();
  86. this.renderTarget1 = renderTarget;
  87. this.renderTarget2 = renderTarget.clone();
  88. this.writeBuffer = this.renderTarget1;
  89. this.readBuffer = this.renderTarget2;
  90. },
  91. setSize: function ( width, height ) {
  92. this.renderTarget1.setSize( width, height );
  93. this.renderTarget2.setSize( width, height );
  94. for ( var i = 0; i < this.passes.length; i ++ ) {
  95. this.passes[ i ].setSize( width, height );
  96. }
  97. }
  98. } );
  99. THREE.Pass = function () {
  100. // if set to true, the pass is processed by the composer
  101. this.enabled = true;
  102. // if set to true, the pass indicates to swap read and write buffer after rendering
  103. this.needsSwap = true;
  104. // if set to true, the pass clears its buffer before rendering
  105. this.clear = false;
  106. // if set to true, the result of the pass is rendered to screen
  107. this.renderToScreen = false;
  108. };
  109. Object.assign( THREE.Pass.prototype, {
  110. setSize: function ( width, height ) {},
  111. render: function ( renderer, writeBuffer, readBuffer, deltaTime, maskActive ) {
  112. console.error( 'THREE.Pass: .render() must be implemented in derived pass.' );
  113. }
  114. } );