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https://github.com/blondie7575/GSCats.git
synced 2025-02-13 20:31:09 +00:00
Basic full-height terrain rendering with spans
This commit is contained in:
blondie7575
parent
803fe40679
commit
68c55aee3b
@ -7,7 +7,8 @@
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objects = {
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/* Begin PBXFileReference section */
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700C39C51F2E5CA800C24F9C /* trigtables.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = trigtables.s; sourceTree = "<group>"; };
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700C39C51F2E5CA800C24F9C /* tables.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = tables.s; sourceTree = "<group>"; };
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7059502B1F37A0BE00BBE90F /* GenerateVRAMTable.py */ = {isa = PBXFileReference; lastKnownFileType = text.script.python; path = GenerateVRAMTable.py; sourceTree = "<group>"; };
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706DF1641F2D39F700AA6680 /* loader.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = loader.s; sourceTree = "<group>"; };
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706DF1651F2D4A8100AA6680 /* terrain.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = terrain.s; sourceTree = "<group>"; };
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7088096C1F2EA4B200D4C950 /* spanRender.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = spanRender.s; sourceTree = "<group>"; };
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@ -29,10 +30,11 @@
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706DF1641F2D39F700AA6680 /* loader.s */,
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706DF1651F2D4A8100AA6680 /* terrain.s */,
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7088096C1F2EA4B200D4C950 /* spanRender.s */,
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700C39C51F2E5CA800C24F9C /* trigtables.s */,
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700C39C51F2E5CA800C24F9C /* tables.s */,
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70E9D8611F2BD95400555C19 /* gscats.s */,
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70E9D8631F2BD95400555C19 /* Makefile */,
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7088096D1F2ECE8D00D4C950 /* GenerateRenderSpans.py */,
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7059502B1F37A0BE00BBE90F /* GenerateVRAMTable.py */,
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);
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sourceTree = "<group>";
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};
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@ -1,8 +1,6 @@
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#!/usr/bin/python
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import sys,os,png
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import argparse
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#!/usr/bin/env python3
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import sys
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def main(argv):
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27
GenerateVRAMTable.py
Executable file
27
GenerateVRAMTable.py
Executable file
@ -0,0 +1,27 @@
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#!/usr/bin/env python3
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import sys
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def main(argv):
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# Prologue
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print ("vramRowEnds:",end="")
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v = 0x20a0
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rowCount = 19
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for jump in range(0,200):
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rowCount += 1
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if (rowCount==20):
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print ("\n\t.word ", end="")
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rowCount=0
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print ("$%x" % v, end="")
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if (rowCount<19):
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print (",", end="")
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v += 160
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if __name__ == "__main__":
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main(sys.argv[1:])
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BIN
gscats.2mg
BIN
gscats.2mg
Binary file not shown.
4
gscats.s
4
gscats.s
@ -82,6 +82,7 @@ kbdScanLeftArrow:
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cmp #TERRAINWIDTH/4-80
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beq kbdScanDone
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inc
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inc
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sta mapScrollPos
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bra kbdScanDone
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@ -90,6 +91,7 @@ kbdScanRightArrow:
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lda mapScrollPos
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beq kbdScanDone
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dec
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dec
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sta mapScrollPos
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bra kbdScanDone
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@ -111,7 +113,7 @@ quitRequested:
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.include "graphics.s"
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.include "terrain.s"
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.include "trigTables.s"
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.include "tables.s"
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endMainBank2:
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@ -31,3 +31,15 @@ sineTable:
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.byte $39, $3C, $3F, $41, $44, $47, $4A, $4D
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.byte $4F, $52, $55, $58, $5B, $5E, $61, $64
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.byte $67, $6A, $6D, $70, $74, $77, $7A, $7D
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vramRowEnds:
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.word $20a0,$2140,$21e0,$2280,$2320,$23c0,$2460,$2500,$25a0,$2640,$26e0,$2780,$2820,$28c0,$2960,$2a00,$2aa0,$2b40,$2be0,$2c80
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.word $2d20,$2dc0,$2e60,$2f00,$2fa0,$3040,$30e0,$3180,$3220,$32c0,$3360,$3400,$34a0,$3540,$35e0,$3680,$3720,$37c0,$3860,$3900
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.word $39a0,$3a40,$3ae0,$3b80,$3c20,$3cc0,$3d60,$3e00,$3ea0,$3f40,$3fe0,$4080,$4120,$41c0,$4260,$4300,$43a0,$4440,$44e0,$4580
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.word $4620,$46c0,$4760,$4800,$48a0,$4940,$49e0,$4a80,$4b20,$4bc0,$4c60,$4d00,$4da0,$4e40,$4ee0,$4f80,$5020,$50c0,$5160,$5200
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.word $52a0,$5340,$53e0,$5480,$5520,$55c0,$5660,$5700,$57a0,$5840,$58e0,$5980,$5a20,$5ac0,$5b60,$5c00,$5ca0,$5d40,$5de0,$5e80
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.word $5f20,$5fc0,$6060,$6100,$61a0,$6240,$62e0,$6380,$6420,$64c0,$6560,$6600,$66a0,$6740,$67e0,$6880,$6920,$69c0,$6a60,$6b00
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.word $6ba0,$6c40,$6ce0,$6d80,$6e20,$6ec0,$6f60,$7000,$70a0,$7140,$71e0,$7280,$7320,$73c0,$7460,$7500,$75a0,$7640,$76e0,$7780
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.word $7820,$78c0,$7960,$7a00,$7aa0,$7b40,$7be0,$7c80,$7d20,$7dc0,$7e60,$7f00,$7fa0,$8040,$80e0,$8180,$8220,$82c0,$8360,$8400
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.word $84a0,$8540,$85e0,$8680,$8720,$87c0,$8860,$8900,$89a0,$8a40,$8ae0,$8b80,$8c20,$8cc0,$8d60,$8e00,$8ea0,$8f40,$8fe0,$9080
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.word $9120,$91c0,$9260,$9300,$93a0,$9440,$94e0,$9580,$9620,$96c0,$9760,$9800,$98a0,$9940,$99e0,$9a80,$9b20,$9bc0,$9c60,$9d00
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19
terrain.s
19
terrain.s
@ -6,7 +6,7 @@
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TERRAINWIDTH = 640 ; In pixels
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MAXTERRAINHEIGHT = 128 ; In pixels
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MAXTERRAINHEIGHT = 100 ; In pixels
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; renderTerrainColumn
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@ -101,16 +101,31 @@ renderTerrainColumnsDone:
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; No stack operations permitted here!
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;
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renderTerrain:
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lda #199
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sta spanChainIndex
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sty <MAPSCROLLPOS
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FASTGRAPHICS
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lda #$9d00-1 ; Point stack to end of VRAM
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renderTerrainLoop:
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lda spanChainIndex
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asl
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tay
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lda vramRowEnds,y ;$9d00-1 ; Point stack to end of VRAM row
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dec
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tcs
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jmp renderClippedSpanChain
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renderSpanChainComplete:
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lda spanChainIndex
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dec
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cmp #200-MAXTERRAINHEIGHT
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beq renderTerrainDone
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sta spanChainIndex
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bra renderTerrainLoop
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renderTerrainDone:
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SLOWGRAPHICS
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rts
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