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📄 WebGLIndexedBufferRenderer.js

📊 Analysis Summary

Metric	Count
🔧 Functions	7
📊 Variables & Constants	5

📚 Table of Contents

• Variables & Constants
• Functions

🛠️ File Location:

📂 src/renderers/webgl/WebGLIndexedBufferRenderer.js

Variables & Constants

Name	Type	Kind	Value	Exported
mode	any	let/var	*not shown*	✗
type	any	let/var	*not shown*	✗
bytesPerElement	any	let/var	*not shown*	✗
elementCount	number	let/var	0	✗
elementCount	number	let/var	0	✗

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Functions

WebGLIndexedBufferRenderer(gl: any, extensions: any, info: any): void

Parameters:

• gl any
• extensions any
• info any

Returns: void

Calls:

• gl.drawElements
• info.update
• gl.drawElementsInstanced
• extensions.get
• extension.multiDrawElementsWEBGL
• renderInstances
• extension.multiDrawElementsInstancedWEBGL

Internal Comments:

// (x4)

Code

function WebGLIndexedBufferRenderer( gl, extensions, info ) {

    let mode;

    function setMode( value ) {

        mode = value;

    }

    let type, bytesPerElement;

    function setIndex( value ) {

        type = value.type;
        bytesPerElement = value.bytesPerElement;

    }

    function render( start, count ) {

        gl.drawElements( mode, count, type, start * bytesPerElement );

        info.update( count, mode, 1 );

    }

    function renderInstances( start, count, primcount ) {

        if ( primcount === 0 ) return;

        gl.drawElementsInstanced( mode, count, type, start * bytesPerElement, primcount );

        info.update( count, mode, primcount );

    }

    function renderMultiDraw( starts, counts, drawCount ) {

        if ( drawCount === 0 ) return;

        const extension = extensions.get( 'WEBGL_multi_draw' );
        extension.multiDrawElementsWEBGL( mode, counts, 0, type, starts, 0, drawCount );

        let elementCount = 0;
        for ( let i = 0; i < drawCount; i ++ ) {

            elementCount += counts[ i ];

        }

        info.update( elementCount, mode, 1 );


    }

    function renderMultiDrawInstances( starts, counts, drawCount, primcount ) {

        if ( drawCount === 0 ) return;

        const extension = extensions.get( 'WEBGL_multi_draw' );

        if ( extension === null ) {

            for ( let i = 0; i < starts.length; i ++ ) {

                renderInstances( starts[ i ] / bytesPerElement, counts[ i ], primcount[ i ] );

            }

        } else {

            extension.multiDrawElementsInstancedWEBGL( mode, counts, 0, type, starts, 0, primcount, 0, drawCount );

            let elementCount = 0;
            for ( let i = 0; i < drawCount; i ++ ) {

                elementCount += counts[ i ] * primcount[ i ];

            }

            info.update( elementCount, mode, 1 );

        }

    }

    //

    this.setMode = setMode;
    this.setIndex = setIndex;
    this.render = render;
    this.renderInstances = renderInstances;
    this.renderMultiDraw = renderMultiDraw;
    this.renderMultiDrawInstances = renderMultiDrawInstances;

}

setMode(value: any): void

Parameters:

• value any

Returns: void

Code

function setMode( value ) {

        mode = value;

    }

setIndex(value: any): void

Parameters:

• value any

Returns: void

Code

function setIndex( value ) {

        type = value.type;
        bytesPerElement = value.bytesPerElement;

    }

render(start: any, count: any): void

Parameters:

• start any
• count any

Returns: void

Calls:

• gl.drawElements
• info.update

Code

function render( start, count ) {

        gl.drawElements( mode, count, type, start * bytesPerElement );

        info.update( count, mode, 1 );

    }

renderInstances(start: any, count: any, primcount: any): void

Parameters:

• start any
• count any
• primcount any

Returns: void

Calls:

• gl.drawElementsInstanced
• info.update

Code

function renderInstances( start, count, primcount ) {

        if ( primcount === 0 ) return;

        gl.drawElementsInstanced( mode, count, type, start * bytesPerElement, primcount );

        info.update( count, mode, primcount );

    }

renderMultiDraw(starts: any, counts: any, drawCount: any): void

Parameters:

• starts any
• counts any
• drawCount any

Returns: void

Calls:

• extensions.get
• extension.multiDrawElementsWEBGL
• info.update

Code

function renderMultiDraw( starts, counts, drawCount ) {

        if ( drawCount === 0 ) return;

        const extension = extensions.get( 'WEBGL_multi_draw' );
        extension.multiDrawElementsWEBGL( mode, counts, 0, type, starts, 0, drawCount );

        let elementCount = 0;
        for ( let i = 0; i < drawCount; i ++ ) {

            elementCount += counts[ i ];

        }

        info.update( elementCount, mode, 1 );


    }

renderMultiDrawInstances(starts: any, counts: any, drawCount: any, primcount: any): void

Parameters:

• starts any
• counts any
• drawCount any
• primcount any

Returns: void

Calls:

• extensions.get
• renderInstances
• extension.multiDrawElementsInstancedWEBGL
• info.update

Code

function renderMultiDrawInstances( starts, counts, drawCount, primcount ) {

        if ( drawCount === 0 ) return;

        const extension = extensions.get( 'WEBGL_multi_draw' );

        if ( extension === null ) {

            for ( let i = 0; i < starts.length; i ++ ) {

                renderInstances( starts[ i ] / bytesPerElement, counts[ i ], primcount[ i ] );

            }

        } else {

            extension.multiDrawElementsInstancedWEBGL( mode, counts, 0, type, starts, 0, primcount, 0, drawCount );

            let elementCount = 0;
            for ( let i = 0; i < drawCount; i ++ ) {

                elementCount += counts[ i ] * primcount[ i ];

            }

            info.update( elementCount, mode, 1 );

        }

    }

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