70 lines
1.2 KiB
JavaScript
70 lines
1.2 KiB
JavaScript
/**
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* @author mrdoob / http://mrdoob.com/
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*/
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function WebGLIndexedBufferRenderer( gl, extensions, info, capabilities ) {
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var mode;
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function setMode( value ) {
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mode = value;
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}
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var type, bytesPerElement;
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function setIndex( value ) {
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type = value.type;
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bytesPerElement = value.bytesPerElement;
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}
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function render( start, count ) {
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gl.drawElements( mode, count, type, start * bytesPerElement );
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info.update( count, mode );
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}
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function renderInstances( geometry, start, count ) {
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var extension;
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if ( capabilities.isWebGL2 ) {
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extension = gl;
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} else {
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var extension = extensions.get( 'ANGLE_instanced_arrays' );
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if ( extension === null ) {
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console.error( 'THREE.WebGLIndexedBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
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return;
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}
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}
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extension[ capabilities.isWebGL2 ? 'drawElementsInstanced' : 'drawElementsInstancedANGLE' ]( mode, count, type, start * bytesPerElement, geometry.maxInstancedCount );
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info.update( count, mode, geometry.maxInstancedCount );
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}
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//
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this.setMode = setMode;
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this.setIndex = setIndex;
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this.render = render;
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this.renderInstances = renderInstances;
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}
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export { WebGLIndexedBufferRenderer };
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