Sprites - Revision history

Grenouye: /* Sprite Registers */

2021-06-28T03:49:13Z

‎Sprite Registers

Grenouye at 03:01, 28 June 2021

2021-06-28T03:01:13Z

Grenouye at 03:00, 28 June 2021

2021-06-28T03:00:06Z

Grenouye at 02:37, 28 June 2021

2021-06-28T02:37:57Z

Boris Dietrich at 15:56, 11 April 2019

2019-04-11T15:56:28Z

Boris Dietrich: /* Sprite Registers */

2019-04-11T11:01:35Z

‎Sprite Registers

Boris Dietrich at 11:01, 11 April 2019

2019-04-11T11:01:12Z

Boris Dietrich: Created page with "== SPRITES == Sprite is a computer graphics term for a two-dimensional bitmap that is integrated into a larger scene. Originally sprites referred to independent objects that..."

2019-04-11T10:58:46Z

Created page with "== SPRITES == Sprite is a computer graphics term for a two-dimensional bitmap that is integrated into a larger scene. Originally sprites referred to independent objects that..."

New page

== SPRITES ==

Sprite is a computer graphics term for a two-dimensional bitmap that is integrated into a larger scene.

Originally sprites referred to independent objects that are composited together, by hardware, with other elements such as a background or tiles. The composition occurs as each scan line is prepared for the video output device, without involvement of the main CPU and without the need for a full-screen frame buffer. Sprites can be positioned or altered by setting attributes used during the hardware composition process.

Vicky is able to render 32 non-multiplexed sprites with a resolution of 32x32 pixels each. Just as bitmaps, a [[LUT]] is required for selecting 256 out of 16.777.216 colors.

== Sprite Registers ==

Each Sprite has registers composed of a total of 8 bytes for manipulation, starting at $AF:0200 and spanning through to $AF:02FF. The first one of each 8 byte block is always the Control Register with the following attributes:

{|
|SPRITE_Enable||= $01
|SPRITE_LUT0||= $02
|SPRITE_LUT1||= $04
|SPRITE_LUT2||= $08
|SPRITE_DEPTH0||= $10
|SPRITE_DEPTH1||= $20
|SPRITE_DEPTH2||= $40
|}

The following is an overview of all the attributes of the 8 byte block:

{|
|SP00_CONTROL_REG||= $AF02*0
|SP00_ADDY_PTR_L||= $AF0201
|SP00_ADDY_PTR_M||= $AF0202
|SP00_ADDY_PTR_H||= $AF0203
|SP00_X_POS_L||= $AF0204
|SP00_X_POS_H||= $AF0205
|SP00_Y_POS_L||= $AF0206
|SP00_Y_POS_H||= $AF0207
|}

@@ Line 13: / Line 13: @@
 The first set of sprite manipulation registers are shown below:
-{| {{Wikitable}}
+{| class="wikitable"
 !Attribute
 !Address

@@ Line 4: / Line 4: @@
 Vicky is able to render 64 non-multiplexed sprites with a resolution of 32x32 pixels each. Just as bitmaps, a [[LUT]] is required for selecting 256 out of 16.777.216 colors.
 == Sprite Registers ==
@@ Line 55: / Line 57: @@
 |SPRITE_Collision_On||= $80
 |}

← Older revision		Revision as of 03:00, 28 June 2021
Line 55:		Line 55:
	\|SPRITE_Collision_On\|\|= $80		\|SPRITE_Collision_On\|\|= $80
	\|}		\|}
		+
		+	NOTE: The upper left corner of the sprite is offset by 32 pixels. Using (0,0) will hide the sprite. Position (32,32) is mapped to the upper left corner of the screen.

@@ Line 3: / Line 3: @@
 Originally sprites referred to independent objects that are composited together, by hardware, with other elements such as a background or tiles. The composition occurs as each scan line is prepared for the video output device, without involvement of the main CPU and without the need for a full-screen frame buffer. Sprites can be positioned or altered by setting attributes used during the hardware composition process.
-Vicky is able to render 32 non-multiplexed sprites with a resolution of 32x32 pixels each. Just as bitmaps, a [[LUT]] is required for selecting 256 out of 16.777.216 colors.
+Vicky is able to render 64 non-multiplexed sprites with a resolution of 32x32 pixels each. Just as bitmaps, a [[LUT]] is required for selecting 256 out of 16.777.216 colors.
 == Sprite Registers ==
-Each Sprite has registers composed of a total of 8 bytes for manipulation, starting at $AF:0200 and spanning through to $AF:02FF. The first one of each 8 byte block is always the control register with the following attributes:
+Each Sprite has registers composed of a total of 8 bytes for manipulation, starting at $AF:0C00 and spanning through to $AF:0DFF.
 {| {{Wikitable}}
 !Attribute
-!Bit
+!Address
 |-
-|SPRITE_Enable||= $01
+|SP00_ADDY_PTR_L||= $AF:0C01
 |-
-|SPRITE_LUT0||= $02
+|SP00_ADDY_PTR_M||= $AF:0C02
 |-
-|SPRITE_LUT1||= $04
+|SP00_ADDY_PTR_H||= $AF:0C03
 |-
-|SPRITE_LUT2||= $08
+|SP00_X_POS_L||= $AF:0C04
 |-
-|SPRITE_DEPTH0||= $10
+|SP00_X_POS_H||= $AF:0C05
 |-
-|SPRITE_DEPTH1||= $20
+|SP00_Y_POS_L||= $AF:0C06
 |-
-|SPRITE_DEPTH2||= $40
+|SP00_Y_POS_H||= $AF:0C07
 |}
-The following is an overview of all the attributes of the 8 byte block:
+The sprite control register (SPxy_CONTROL_REG) is always the first byte of the 8 byte block.  The register is configured as follows:
 {| {{Wikitable}}
 !Attribute
-!Address
+!Bit
 |-
-|SP00_CONTROL_REG||= $AF02*0
+|SPRITE_Enable||= $01
 |-
-|SP00_ADDY_PTR_L||= $AF02*1
+|SPRITE_LUT0||= $02
 |-
-|SP00_ADDY_PTR_M||= $AF02*2
+|SPRITE_LUT1||= $04
 |-
-|SP00_ADDY_PTR_H||= $AF02*3
+|SPRITE_LUT2||= $08
 |-
-|SP00_X_POS_L||= $AF02*4
+|SPRITE_DEPTH0||= $10
 |-
-|SP00_X_POS_H||= $AF02*5
+|SPRITE_DEPTH1||= $20
 |-
-|SP00_Y_POS_L||= $AF02*6
+|SPRITE_DEPTH2||= $40
 |-
-|SP00_Y_POS_H||= $AF02*7
+|SPRITE_Collision_On||= $80
 |}

← Older revision		Revision as of 15:56, 11 April 2019
Line 1:		Line 1:
−	~~== SPRITES ==~~
−
	Sprite is a computer graphics term for a two-dimensional bitmap that is integrated into a larger scene.		Sprite is a computer graphics term for a two-dimensional bitmap that is integrated into a larger scene.