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When drawing using triangle strips or fans, [[GPU/Internal Registers#GPUREG_RESTART_PRIMITIVE|GPUREG_RESTART_PRIMITIVE]] should be used to end the previous strip before (or while) drawing.
When drawing using triangle strips or fans, [[GPU/Internal Registers#GPUREG_RESTART_PRIMITIVE|GPUREG_RESTART_PRIMITIVE]] should be used to end the previous strip before (or while) drawing.
== Drawing elements ==
The 3DS GPU is capable of drawing vertex + index arrays, triggered by [[GPU/Internal_Registers#GPUREG_DRAWELEMENTS|GPUREG_DRAWELEMENTS]]. A set of commands commonly used by the standard GL implementation to accomplish this is as follows:
{| class="wikitable" border="1"
! Command Index
! Register
! Description
|-
| 0
| [[GPU/Internal_Registers#GPUREG_GEOSTAGE_CONFIG|GPUREG_GEOSTAGE_CONFIG]]
| Set whether drawing triangle elements
|-
| 1-2
| [[GPU/Internal_Registers#GPUREG_GEOSTAGE_CONFIG2|GPUREG_GEOSTAGE_CONFIG2]]
| Set whether drawing triangle elements
|-
| 3
| [[GPU/Internal_Registers#GPUREG_PRIMITIVE_CONFIG|GPUREG_PRIMITIVE_CONFIG]]
| Set primitive mode
|-
| 4
| [[GPU/Internal_Registers#GPUREG_PRIMITIVE_CONFIG|GPUREG_PRIMITIVE_CONFIG]]
| Set number of output map registers
|-
| 5
| [[GPU/Internal_Registers#GPUREG_RESTART_PRIMITIVE|GPUREG_RESTART_PRIMITIVE]]
| Trigger reset
|-
| 6
| [[GPU/Internal_Registers#GPUREG_GEOSTAGE_CONFIG2|GPUREG_GEOSTAGE_CONFIG2]]
| Set function indicator to 0
|-
| 7
| [[GPU/Internal_Registers#GPUREG_INDEXBUFFER_CONFIG|GPUREG_INDEXBUFFER_CONFIG]]
| Set offset and type
|-
| 8
| [[GPU/Internal_Registers#GPUREG_NUMVERTICES|GPUREG_NUMVERTICES]]
| Set vertex count
|-
| 9
| [[GPU/Internal_Registers#GPUREG_START_DRAW_FUNC0|GPUREG_START_DRAW_FUNC0]]
| Set mode to drawing
|-
| 10
| [[GPU/Internal_Registers#GPUREG_DRAWELEMENTS|GPUREG_DRAWELEMENTS]]
| Trigger draw
|-
| 11
| [[GPU/Internal_Registers#GPUREG_START_DRAW_FUNC0|GPUREG_START_DRAW_FUNC0]]
| Set mode to configuration
|-
| 12
| [[GPU/Internal_Registers#GPUREG_VTX_FUNC|GPUREG_VTX_FUNC]]
| Trigger post-vertex cache clear
|-
| 13
| [[GPU/Internal_Registers#GPUREG_FRAMEBUFFER_FLUSH|GPUREG_FRAMEBUFFER_FLUSH]]
| Flush framebuffer
|-
| 14
| [[GPU/Internal_Registers#GPUREG_GEOSTAGE_CONFIG|GPUREG_GEOSTAGE_CONFIG]]
| Clear drawing triangle elements
|-
| 15
| [[GPU/Internal_Registers#GPUREG_GEOSTAGE_CONFIG2|GPUREG_GEOSTAGE_CONFIG2]]
| Clear drawing triangle elements
|-
| 16
| [[GPU/Internal_Registers#GPUREG_PRIMITIVE_CONFIG|GPUREG_PRIMITIVE_CONFIG]]
| Clear primitive mode
|-
| 17
| [[GPU/Internal_Registers#GPUREG_VSH_ENTRYPOINT|GPUREG_VSH_ENTRYPOINT]]
| Clear entry point
|}
[[Category:GPU]]
[[Category:GPU]]