Fix `renderer.info.render` data if use `BatchedMesh._multiDraw` (#29532)

* Fix multidraw render info

* WebGLBufferRender fix

src/renderers/webgl-fallback/WebGLBufferRenderer.js

@@ -120,18 +120,13 @@ class WebGLBufferRenderer {
 			}
 
 			let elementCount = 0;
-
 			for ( let i = 0; i < drawCount; i ++ ) {
 
-				elementCount += counts[ i ];
+				elementCount += counts[ i ] * primcount[ i ];
 
 			}
 
-			for ( let i = 0; i < primcount.length; i ++ ) {
-
-				info.update( object, elementCount, mode, primcount[ i ] );
-
-			}
+			info.update( object, elementCount, mode, 1 );
 
 		}
 

src/renderers/webgl/WebGLBufferRenderer.js

@@ -65,15 +65,11 @@ function WebGLBufferRenderer( gl, extensions, info ) {
 			let elementCount = 0;
 			for ( let i = 0; i < drawCount; i ++ ) {
 
-				elementCount += counts[ i ];
+				elementCount += counts[ i ] * primcount[ i ];
 
 			}
 
-			for ( let i = 0; i < primcount.length; i ++ ) {
-
-				info.update( elementCount, mode, primcount[ i ] );
-
-			}
+			info.update( elementCount, mode, 1 );
 
 		}
 

src/renderers/webgl/WebGLIndexedBufferRenderer.js

@@ -75,15 +75,11 @@ function WebGLIndexedBufferRenderer( gl, extensions, info ) {
 			let elementCount = 0;
 			for ( let i = 0; i < drawCount; i ++ ) {
 
-				elementCount += counts[ i ];
+				elementCount += counts[ i ] * primcount[ i ];
 
 			}
 
-			for ( let i = 0; i < primcount.length; i ++ ) {
-
-				info.update( elementCount, mode, primcount[ i ] );
-
-			}
+			info.update( elementCount, mode, 1 );
 
 		}