在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

ANGLE_instanced_arrays.drawElementsInstancedANGLE() 方法在 WebGL API renders primitives from array data like the gl.drawElements() method. In addition, it can execute multiple instances of a set of elements.

注意： 当使用 WebGL2 , this method is available as gl.drawElementsInstanced() 在默认情况下。

句法

void ext.drawElementsInstancedANGLE(mode, count, type, offset, primcount);
					

参数

mode

A GLenum specifying the type primitive to render. Possible values are:

• gl.POINTS : Draws a single dot.
• gl.LINE_STRIP : Draws a straight line to the next vertex.
• gl.LINE_LOOP : Draws a straight line to the next vertex, and connects the last vertex back to the first.
• gl.LINES : Draws a line between a pair of vertices.
• gl.TRIANGLE_STRIP
• gl.TRIANGLE_FAN
• gl.TRIANGLES : Draws a triangle for a group of three vertices.

count

GLsizei specifying the number of elements to be rendered.

type

A GLenum specifying the type of the values in the element array buffer. Possible values are:

• gl.UNSIGNED_BYTE
• gl.UNSIGNED_SHORT
• 当使用 OES_element_index_uint extension:
  • gl.UNSIGNED_INT

offset

GLintptr specifying an offset in the element array buffer. Must be a valid multiple of the size of the given type .

primcount

GLsizei specifying the number of instances of the set of elements to execute.

返回值

None.

异常

• 若 mode is not one of the accepted values, a gl.INVALID_ENUM error is thrown.
• 若 offset is a invalid multiple of the size of the given type, a gl.INVALID_OPERATION error is thrown.
• 若 count or primcount are negative, a gl.INVALID_VALUE error is thrown.

范例

var ext = gl.getExtension('ANGLE_instanced_arrays');
ext.drawElementsInstancedANGLE(gl.POINTS, 2, gl.UNSIGNED_SHORT, 0, 4);
					

规范

规范	状态	注释
ANGLE_instanced_arrays The definition of 'ANGLE_instanced_arrays' in that specification.	推荐	初始定义。

浏览器兼容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
drawElementsInstancedANGLE	Chrome 30	Edge 12	Firefox 33	IE 11	Opera 17	Safari 7	WebView Android 4.4	Chrome Android 30	Firefox Android Yes	Opera Android 18	Safari iOS Yes	Samsung Internet Android 2.0

图例

完整支持

完整支持

另请参阅

• ext.drawArraysInstancedANGLE()
• ext.vertexAttribDivisorANGLE()
• WebGLRenderingContext.drawArrays()
• WebGLRenderingContext.drawElements()
• WebGL2RenderingContext.drawArraysInstanced()
• WebGL2RenderingContext.drawElementsInstanced()
• WebGL2RenderingContext.vertexAttribDivisor()

元数据

• 最后修改： Jun 6, 2019

相关话题

1. WebGL API
2. ANGLE_instanced_arrays
3. 方法

   1. drawArraysInstancedANGLE()
   2. drawElementsInstancedANGLE()
   3. vertexAttribDivisorANGLE()
4. WebGL 相关页面

   1. EXT_blend_minmax
   2. EXT_color_buffer_half_float
   3. EXT_disjoint_timer_query
   4. EXT_frag_depth
   5. EXT_sRGB
   6. EXT_shader_texture_lod
   7. EXT_texture_filter_anisotropic
   8. OES_element_index_uint
   9. OES_standard_derivatives
   10. OES_texture_float
   11. OES_texture_float_linear
   12. OES_texture_half_float
   13. OES_texture_half_float_linear
   14. OES_vertex_array_object
   15. WEBGL_color_buffer_float
   16. WEBGL_compressed_texture_atc
   17. WEBGL_compressed_texture_etc1
   18. WEBGL_compressed_texture_pvrtc
   19. WEBGL_compressed_texture_s3tc
   20. WEBGL_compressed_texture_s3tc_srgb
   21. WEBGL_debug_renderer_info
   22. WEBGL_debug_shaders
   23. WEBGL_depth_texture
   24. WEBGL_draw_buffers
   25. WEBGL_lose_context
   26. WebGL2RenderingContext
   27. WebGLActiveInfo
   28. WebGLBuffer
   29. WebGLContextEvent
   30. WebGLFramebuffer
   31. WebGLObject
   32. WebGLProgram
   33. WebGLQuery
   34. WebGLRenderbuffer
   35. WebGLRenderingContext
   36. WebGLSampler
   37. WebGLShader
   38. WebGLShaderPrecisionFormat
   39. WebGLSync
   40. WebGLTexture
   41. WebGLTransformFeedback
   42. WebGLUniformLocation
   43. WebGLVertexArrayObject