Classic Elite entity states - Revision history

Kroccamen: Add C64 entitiy layout

2019-01-12T22:48:54Z

Add C64 entitiy layout

2016-06-25T02:33:08Z

‎A.I.

2016-06-17T06:19:35Z

‎A.I.

2016-06-13T06:04:27Z

‎A.I.

2016-06-13T05:38:42Z

2016-06-13T05:21:55Z

‎A.I.

2016-06-13T05:17:37Z

‎A.I.

2016-06-13T05:15:25Z

‎A.I.

2016-06-13T05:11:51Z

‎A.I.

2016-06-13T05:09:44Z

‎A.I.

@@ Line 1: / Line 1: @@
-Upon launching from the Space Station the player is confronted by several entities, the planet ahead, the space station behind, and perhaps additional ships. The following description of each entity's state is specific to the BBC Disk [[Classic_Elite|Classic version of Elite]], there are some variations in the other 8-bit versions.
+Upon launching from the Space Station the player is confronted by several entities, the planet ahead, the space station behind, and perhaps additional ships.
 Each entity has a state represented in 37 bytes. The first 9 bytes are the (x,y,z) coordinates to 23bit precision with the player at the origin. The next 18 bytes store a 9-member rotation matrix, with the positive unit vector scaled to 0x6000. A pointer of 2 bytes points to a heap that contains processed vertex data for display.
 Single bytes represent the entity's speed, acceleration, remaining energy, and counters for roll and pitch actions currently underway.
 {| class="wikitable"

@@ Line 77: / Line 77: @@
 |Number of missiles or thargons remaining within entity, maximum is 7.
 |}
-The arrangement of the bits is driven by the preferences of 6502 code. [http://wiki.nesdev.com/w/index.php/6502_assembly_optimisations#Easily_test_2_upper_bits_of_a_variable Direct bit tests exist for the highest bits], and the lower bits tend to be used to count small quantities.
+The arrangement of the bits is driven by the preferences of 6502 machine code. [http://wiki.nesdev.com/w/index.php/6502_assembly_optimisations#Easily_test_2_upper_bits_of_a_variable Direct bit tests exist for the highest bits], and the lower bits tend to be used to count small quantities.
 Source code for the BBC tape and TUBE versions of BBC Elite can be found at [http://www.iancgbell.clara.net/elite/text/index.htm Ian Bell's] web site and were used to disassemble and interpret the Disk version described here.

@@ Line 34: / Line 34: @@
 |-
 |6
-|Entity is a Police vessel, protected by Space Station, destroying one affects your legal status.
+|Entity is a Police vessel, destroying one affects your legal status.
 |-
 |5
 |-
 |4

@@ Line 77: / Line 77: @@
 |Number of missiles or thargons remaining within entity, maximum is 7.
 |}
 Source code for the BBC tape and TUBE versions of BBC Elite can be found at [http://www.iancgbell.clara.net/elite/text/index.htm Ian Bell's] web site and were used to disassemble and interpret the Disk version described here.

← Older revision		Revision as of 05:38, 13 June 2016
Line 1:		Line 1:
−	Upon launching from the Space Station the player is confronted by several entities, the planet ahead, the space station behind, and perhaps additional ships. The following description of each entity's state is specific to the BBC Disk [[Classic_Elite\|Classic version of Elite]], there are some variations in ~~the~~ the other 8-bit versions.	+	Upon launching from the Space Station the player is confronted by several entities, the planet ahead, the space station behind, and perhaps additional ships. The following description of each entity's state is specific to the BBC Disk [[Classic_Elite\|Classic version of Elite]], there are some variations in the other 8-bit versions.

	Each entity has a state represented in 37 bytes. The first 9 bytes are the (x,y,z) coordinates to 23bit precision with the player at the origin. The next 18 bytes store a 9-member rotation matrix, with the positive unit vector scaled to 0x6000. A pointer of 2 bytes points to a heap that contains processed vertex data for display.		Each entity has a state represented in 37 bytes. The first 9 bytes are the (x,y,z) coordinates to 23bit precision with the player at the origin. The next 18 bytes store a 9-member rotation matrix, with the positive unit vector scaled to 0x6000. A pointer of 2 bytes points to a heap that contains processed vertex data for display.

@@ Line 31: / Line 31: @@
 |-
 |7
-|Remove entity silently, too far away or scooped cargo.
+|Remove entity silently, too far away or entity is scooped cargo.
 |-
 |6

@@ Line 7: / Line 7: @@
 == A.I. ==
-The remaining 3 bytes represent the entity's A.I., which we shall refer to as the '''Visible''', '''Attack''', and '''Behaviour States'''. Some bits serve more than one purpose if they are set.
+The remaining 3 bytes represent the entity's A.I., which we shall refer to as the '''Attack''', '''Behaviour''' and '''Visible States'''. Some bits serve more than one purpose if they are set.
 {| class="wikitable"
@@ Line 55: / Line 55: @@
 |}
 Source code for the BBC tape and TUBE versions of BBC Elite can be found at [http://www.iancgbell.clara.net/elite/text/index.htm Ian Bell's] web site and were used to disassemble and interpret the Disk version described here.

@@ Line 14: / Line 14: @@
 |-
 |7
-|Kill entity with dust explosion
+|Terminate entity with a dust explosion
 |-
 |6

@@ Line 46: / Line 46: @@
 |-
 |0
-|Entity has an E.C.M.
+|Entity has an E.C.M. (Electronic Counter Measures) to destroy in-flight missiles.
 |}

@@ Line 43: / Line 43: @@
 |-
 |5,4,3,2,1
-|I.D. of Missile's target (only bit1 set is Space station or Sun), or refinement to level of aggression.
+|I.D. of Missile's target, or refinement to level of aggression.
 |-
 |0
@@ Line 77: / Line 77: @@
 |Peaceful trader, maybe attacks player if player's legal status is fugitive.
 |}