File size: 1,619 Bytes
b797337 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | function WebGLBufferRenderer( gl, extensions, info, capabilities ) {
const isWebGL2 = capabilities.isWebGL2;
let mode;
function setMode( value ) {
mode = value;
}
function render( start, count ) {
gl.drawArrays( mode, start, count );
info.update( count, mode, 1 );
}
function renderInstances( start, count, primcount ) {
if ( primcount === 0 ) return;
let extension, methodName;
if ( isWebGL2 ) {
extension = gl;
methodName = 'drawArraysInstanced';
} else {
extension = extensions.get( 'ANGLE_instanced_arrays' );
methodName = 'drawArraysInstancedANGLE';
if ( extension === null ) {
console.error( 'THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
return;
}
}
extension[ methodName ]( mode, start, count, primcount );
info.update( count, mode, primcount );
}
function renderMultiDraw( starts, counts, drawCount ) {
if ( drawCount === 0 ) return;
const extension = extensions.get( 'WEBGL_multi_draw' );
if ( extension === null ) {
for ( let i = 0; i < drawCount; i ++ ) {
this.render( starts[ i ], counts[ i ] );
}
} else {
extension.multiDrawArraysWEBGL( mode, starts, 0, counts, 0, drawCount );
let elementCount = 0;
for ( let i = 0; i < drawCount; i ++ ) {
elementCount += counts[ i ];
}
info.update( elementCount, mode, 1 );
}
}
//
this.setMode = setMode;
this.render = render;
this.renderInstances = renderInstances;
this.renderMultiDraw = renderMultiDraw;
}
export { WebGLBufferRenderer };
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