draw method
Draws a triangle list with indices.
Implementation
@override
void draw(Mesh mesh) {
if (mesh is! _WGLMesh) return; // Error handling.
_context.bindVertexArray(mesh._vaoHandle);
_context.drawElements(
web_gl.WebGL.TRIANGLES, mesh.indexCount, web_gl.WebGL.UNSIGNED_INT, 0);
_context.bindVertexArray(null);
}