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import { Pass } from './Pass.js';
class MaskPass extends Pass {
constructor( scene, camera ) {
super();
this.scene = scene;
this.camera = camera;
this.clear = true;
this.needsSwap = false;
this.inverse = false;
}
render( renderer, writeBuffer, readBuffer /*, deltaTime, maskActive */ ) {
const context = renderer.getContext();
const state = renderer.state;
// don't update color or depth
state.buffers.color.setMask( false );
state.buffers.depth.setMask( false );
// lock buffers
state.buffers.color.setLocked( true );
state.buffers.depth.setLocked( true );
// set up stencil
let writeValue, clearValue;
if ( this.inverse ) {
writeValue = 0;
clearValue = 1;
} else {
writeValue = 1;
clearValue = 0;
}
state.buffers.stencil.setTest( true );
state.buffers.stencil.setOp( context.REPLACE, context.REPLACE, context.REPLACE );
state.buffers.stencil.setFunc( context.ALWAYS, writeValue, 0xffffffff );
state.buffers.stencil.setClear( clearValue );
state.buffers.stencil.setLocked( true );
// draw into the stencil buffer
renderer.setRenderTarget( readBuffer );
if ( this.clear ) renderer.clear();
renderer.render( this.scene, this.camera );
renderer.setRenderTarget( writeBuffer );
if ( this.clear ) renderer.clear();
renderer.render( this.scene, this.camera );
// unlock color and depth buffer and make them writable for subsequent rendering/clearing
state.buffers.color.setLocked( false );
state.buffers.depth.setLocked( false );
state.buffers.color.setMask( true );
state.buffers.depth.setMask( true );
// only render where stencil is set to 1
state.buffers.stencil.setLocked( false );
state.buffers.stencil.setFunc( context.EQUAL, 1, 0xffffffff ); // draw if == 1
state.buffers.stencil.setOp( context.KEEP, context.KEEP, context.KEEP );
state.buffers.stencil.setLocked( true );
}
}
class ClearMaskPass extends Pass {
constructor() {
super();
this.needsSwap = false;
}
render( renderer /*, writeBuffer, readBuffer, deltaTime, maskActive */ ) {
renderer.state.buffers.stencil.setLocked( false );
renderer.state.buffers.stencil.setTest( false );
}
}
export { MaskPass, ClearMaskPass };