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The following table lists the IRIS GL functions that get the state of matrices and transformations and their OpenGL equivalents.
| IRIS GL matrix query | OpenGL glGet matrix query | Meaning |
|---|---|---|
| getmmode | GL_MATRIX_MODE | Returns the current matrix mode. |
| getmatrix in MVIEWING mode | GL_MODELVIEW_MATRIX | Returns a copy of the current model-view matrix. |
| getmatrix in MPROJECTION mode | GL_PROJECTION_MATRIX | Returns a copy of the current projection matrix. |
| getmatrix in MTEXTURE mode | GL_TEXTURE_MATRIX | Returns a copy of the current texture matrix. |
| Not applicable. | GL_MAX_MODELVIEW_STACK_DEPTH | Returns maximum supported depth of the model-view matrix stack. |
| Not applicable. | GL_MAX_PROJECTION_STACK_DEPTH | Returns maximum supported depth of the projection matrix stack. |
| Not applicable. | GL_MAX_TEXTURE_STACK_DEPTH | Returns maximum supported depth of the texture matrix stack. |
| Not applicable. | GL_MODELVIEW_STACK_DEPTH | Returns number of matrices on the model view stack. |
| Not applicable. | GL_PROJECTION_STACK_DEPTH | Returns number of matrices on the projection stack. |
| Not applicable. | GL_TEXTURE_STACK_DEPTH | Returns number of matrices on the texture stack. |
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