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three.js

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提交 8874516e 编写于 作者: B Ben Adams
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Allow non-indexed BufferGeometries 

Allow non-indexed BufferGeometries to render the entire buffer in a single draw call rather than a draw call per 2^16-1 vetexes
上级 a9fa5833
隐藏空白更改
内联 并排
Showing with 139 addition and 56 deletion
src/renderers/WebGLRenderer.js
浏览文件 @ 8874516e
......@@ -3266,102 +3266,185 @@ THREE.WebGLRenderer = function ( parameters ) {
if ( object instanceof THREE.Mesh ) {
var offsets = geometry.offsets;
var index = geometry.attributes["index"];
if (index) {
// Indexed triangles
var offsets = geometry.offsets;
// if there is more than 1 chunk
// must set attribute pointers to use new offsets for each chunk
// even if geometry and materials didn't change
// if there is more than 1 chunk
// must set attribute pointers to use new offsets for each chunk
// even if geometry and materials didn't change
if ( offsets.length > 1 ) updateBuffers = true;
if (offsets.length > 1) updateBuffers = true;
for ( var i = 0, il = offsets.length; i < il; ++ i ) {
for (var i = 0, il = offsets.length; i < il; ++i) {
var startIndex = offsets[ i ].index;
var startIndex = offsets[i].index;
if ( updateBuffers ) {
if (updateBuffers) {
// vertices
// vertices
var position = geometry.attributes[ "position" ];
var positionSize = position.itemSize;
var position = geometry.attributes["position"];
var positionSize = position.itemSize;
_gl.bindBuffer( _gl.ARRAY_BUFFER, position.buffer );
enableAttribute( attributes.position );
_gl.vertexAttribPointer( attributes.position, positionSize, _gl.FLOAT, false, 0, startIndex * positionSize * 4 ); // 4 bytes per Float32
_gl.bindBuffer(_gl.ARRAY_BUFFER, position.buffer);
enableAttribute(attributes.position);
_gl.vertexAttribPointer(attributes.position, positionSize, _gl.FLOAT, false, 0, startIndex * positionSize * 4); // 4 bytes per Float32
// normals
// normals
var normal = geometry.attributes[ "normal" ];
var normal = geometry.attributes["normal"];
if ( attributes.normal >= 0 && normal ) {
if (attributes.normal >= 0 && normal) {
var normalSize = normal.itemSize;
var normalSize = normal.itemSize;
_gl.bindBuffer( _gl.ARRAY_BUFFER, normal.buffer );
enableAttribute( attributes.normal );
_gl.vertexAttribPointer( attributes.normal, normalSize, _gl.FLOAT, false, 0, startIndex * normalSize * 4 );
_gl.bindBuffer(_gl.ARRAY_BUFFER, normal.buffer);
enableAttribute(attributes.normal);
_gl.vertexAttribPointer(attributes.normal, normalSize, _gl.FLOAT, false, 0, startIndex * normalSize * 4);
}
}
// uvs
// uvs
var uv = geometry.attributes[ "uv" ];
var uv = geometry.attributes["uv"];
if ( attributes.uv >= 0 && uv ) {
if (attributes.uv >= 0 && uv) {
var uvSize = uv.itemSize;
var uvSize = uv.itemSize;
_gl.bindBuffer( _gl.ARRAY_BUFFER, uv.buffer );
enableAttribute( attributes.uv );
_gl.vertexAttribPointer( attributes.uv, uvSize, _gl.FLOAT, false, 0, startIndex * uvSize * 4 );
_gl.bindBuffer(_gl.ARRAY_BUFFER, uv.buffer);
enableAttribute(attributes.uv);
_gl.vertexAttribPointer(attributes.uv, uvSize, _gl.FLOAT, false, 0, startIndex * uvSize * 4);
}
}
// colors
// colors
var color = geometry.attributes[ "color" ];
var color = geometry.attributes["color"];
if ( attributes.color >= 0 && color ) {
if (attributes.color >= 0 && color) {
var colorSize = color.itemSize;
var colorSize = color.itemSize;
_gl.bindBuffer( _gl.ARRAY_BUFFER, color.buffer );
enableAttribute( attributes.color );
_gl.vertexAttribPointer( attributes.color, colorSize, _gl.FLOAT, false, 0, startIndex * colorSize * 4 );
_gl.bindBuffer(_gl.ARRAY_BUFFER, color.buffer);
enableAttribute(attributes.color);
_gl.vertexAttribPointer(attributes.color, colorSize, _gl.FLOAT, false, 0, startIndex * colorSize * 4);
}
}
// tangents
// tangents
var tangent = geometry.attributes[ "tangent" ];
var tangent = geometry.attributes["tangent"];
if ( attributes.tangent >= 0 && tangent ) {
if (attributes.tangent >= 0 && tangent) {
var tangentSize = tangent.itemSize;
var tangentSize = tangent.itemSize;
_gl.bindBuffer( _gl.ARRAY_BUFFER, tangent.buffer );
enableAttribute( attributes.tangent );
_gl.vertexAttribPointer( attributes.tangent, tangentSize, _gl.FLOAT, false, 0, startIndex * tangentSize * 4 );
_gl.bindBuffer(_gl.ARRAY_BUFFER, tangent.buffer);
enableAttribute(attributes.tangent);
_gl.vertexAttribPointer(attributes.tangent, tangentSize, _gl.FLOAT, false, 0, startIndex * tangentSize * 4);
}
}
// indices
// indices
_gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, index.buffer);
var index = geometry.attributes[ "index" ];
}
_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, index.buffer );
// render indexed triangles
}
_gl.drawElements(_gl.TRIANGLES, offsets[i].count, _gl.UNSIGNED_SHORT, offsets[i].start * 2); // 2 bytes per Uint16
// render indexed triangles
_this.info.render.calls++;
_this.info.render.vertices += offsets[i].count; // not really true, here vertices can be shared
_this.info.render.faces += offsets[i].count / 3;
_gl.drawElements( _gl.TRIANGLES, offsets[ i ].count, _gl.UNSIGNED_SHORT, offsets[ i ].start * 2 ); // 2 bytes per Uint16
}
_this.info.render.calls ++;
_this.info.render.vertices += offsets[ i ].count; // not really true, here vertices can be shared
_this.info.render.faces += offsets[ i ].count / 3;
}
else
{
// non-indexed triangles
if (updateBuffers) {
}
// vertices
var position = geometry.attributes["position"];
var positionSize = position.itemSize;
_gl.bindBuffer(_gl.ARRAY_BUFFER, position.buffer);
enableAttribute(attributes.position);
_gl.vertexAttribPointer(attributes.position, positionSize, _gl.FLOAT, false, 0, 0);
// normals
var normal = geometry.attributes["normal"];
if (attributes.normal >= 0 && normal) {
var normalSize = normal.itemSize;
_gl.bindBuffer(_gl.ARRAY_BUFFER, normal.buffer);
enableAttribute(attributes.normal);
_gl.vertexAttribPointer(attributes.normal, normalSize, _gl.FLOAT, false, 0, 0);
}
// uvs
var uv = geometry.attributes["uv"];
if (attributes.uv >= 0 && uv) {
var uvSize = uv.itemSize;
_gl.bindBuffer(_gl.ARRAY_BUFFER, uv.buffer);
enableAttribute(attributes.uv);
_gl.vertexAttribPointer(attributes.uv, uvSize, _gl.FLOAT, false, 0, 0);
}
// colors
var color = geometry.attributes["color"];
if (attributes.color >= 0 && color) {
var colorSize = color.itemSize;
_gl.bindBuffer(_gl.ARRAY_BUFFER, color.buffer);
enableAttribute(attributes.color);
_gl.vertexAttribPointer(attributes.color, colorSize, _gl.FLOAT, false, 0, 0);
}
// tangents
var tangent = geometry.attributes["tangent"];
if (attributes.tangent >= 0 && tangent) {
var tangentSize = tangent.itemSize;
_gl.bindBuffer(_gl.ARRAY_BUFFER, tangent.buffer);
enableAttribute(attributes.tangent);
_gl.vertexAttribPointer(attributes.tangent, tangentSize, _gl.FLOAT, false, 0, 0);
}
}
// render non-indexed triangles
_gl.drawArrays(_gl.TRIANGLES, 0, position.numItems / 3);
_this.info.render.calls++;
_this.info.render.vertices += position.numItems / 3;
_this.info.render.faces += position.numItems / 3 / 3;
}
// render particles
......
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