vertex_create_buffer_from_buffer_ext(buffer, format, src_offset, vert_num);
| 参数 | 描述 |
|---|---|
| buffer | The buffer to create the vertex buffer from. |
| format | The primitive vertex format to use. |
| src_offset | The offset within the the source buffer to copy from. |
| vert_num | The number of vertices the buffer should have. |
返回： 指针
As with the function vertex_create_buffer, this
function will create a new vertex buffer, only now the vertex data
it stores is copied from the regular buffer that is specified as
the source. The buffer is pre-formatted with the vertex format for
building primitives for use with (for example) shaders, and you can
also supply an offset within the source buffer to copy from and the
number of vertices that the final buffer should have. Note that if
the number of vertices does not match those being copied you may
get corrupted vertex data.
vertex_format_begin();
vertex_format_add_position_3d();
vertex_format_add_colour();
vertex_format_add_textcoord();
var my_format = vertex_format_end();
v_buff = vertex_create_buffer_from_buffer(global.modelBuff,
myFormat, 0, 512);
The above code will create a new vertex format then create a new vertex buffer from a previously created regular buffer, applying the custom vertex format to it with 0 offset. The function tells the new vertex buffer that it should expect 512 vertices.