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https://github.com/jeremysrand/BuGS.git
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Update the flea sprite as it drops. Add random routines. Thanks to John Brooks for those. Use the random routines to pick a column for the flea to drop from. Also, randomly leave behind a mushroom as it falls.
This commit is contained in:
Jeremy Rand
parent
3fcd2ac8a8
commit
88ea840e23
@ -64,6 +64,7 @@
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9D1716A42491C49300C83148 /* system601.2mg */ = {isa = PBXFileReference; lastKnownFileType = file; path = system601.2mg; sourceTree = "<group>"; };
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9D1716A62491C49300C83148 /* tail.mk */ = {isa = PBXFileReference; lastKnownFileType = text; path = tail.mk; sourceTree = "<group>"; };
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9D1716A92491C49300C83148 /* BuGS.xcscheme */ = {isa = PBXFileReference; lastKnownFileType = text.xml; name = BuGS.xcscheme; path = ../../BuGS.xcodeproj/xcshareddata/xcschemes/BuGS.xcscheme; sourceTree = "<group>"; };
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9D2FF6DA24C4C79A000181E5 /* random.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = random.s; sourceTree = "<group>"; };
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9D3396F424AECB1D003222B3 /* explosions.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = explosions.s; sourceTree = "<group>"; };
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9D3396F524AECBB1003222B3 /* spiders.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = spiders.s; sourceTree = "<group>"; };
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9D3396F624AECC40003222B3 /* scorpions.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = scorpions.s; sourceTree = "<group>"; };
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@ -131,6 +132,7 @@
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9D8FFC612491CAF0005C9327 /* game.h */,
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9DB1505024C3801100558B87 /* gameFlea.s */,
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9D62AF3B249871A300348F45 /* colour.s */,
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9D2FF6DA24C4C79A000181E5 /* random.s */,
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9D3396F324AECACC003222B3 /* sprites */,
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9D1716912491C49300C83148 /* main.rez */,
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9D1716932491C49300C83148 /* Makefile */,
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@ -21,7 +21,8 @@ drawFlea entry
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beq drawFlea_done
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ldy fleaScreenOffset
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jsl flea1
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ldx fleaSprite
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jsl fleaJump
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ldy numDirtyGameTiles
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@ -78,10 +79,23 @@ drawFlea_done anop
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rtl
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fleaJump entry
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lda fleaJumpTable,x
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sta jumpInst+1
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lda fleaJumpTable+2,x
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sta jumpInst+3
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jumpInst jmp >flea1
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nop
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updateFlea entry
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lda fleaState
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beq updateFlea_done
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bne updateFlea_cont
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rtl
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updateFlea_cont anop
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lda fleaHeightInTile
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beq updateFlea_nextTile
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dec a
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@ -94,6 +108,22 @@ updateFlea_bottomOfTile anop
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sta fleaTileOffsets+4
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lda fleaTileOffsets+2
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sta fleaTileOffsets+6
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lda fleaSpriteCounter
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eor #$1
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sta fleaSpriteCounter
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bne updateFlea_nextAction
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lda fleaSprite
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cmp #$c
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beq updateFlea_resetSprite
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clc
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adc #$4
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sta fleaSprite
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bra updateFlea_nextAction
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updateFlea_resetSprite anop
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stz fleaSprite
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bra updateFlea_nextAction
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updateFlea_nextTile anop
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@ -110,6 +140,16 @@ updateFlea_nextTile anop
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lda tiles+8,x
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sta fleaTileOffsets+2
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ldx fleaTileOffsets+4
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lda tiles+4,x
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bne updateFlea_nextAction
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jsl rand65535
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and #$7
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bne updateFlea_nextAction
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lda #$10
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sta tiles+4,x
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bra updateFlea_nextAction
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updateFlea_bottom anop
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@ -136,7 +176,13 @@ addFlea entry
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lda #$3
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sta fleaHeightInTile
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lda #$40
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stz fleaSpriteCounter
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jsl rand25
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asl a
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asl a
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asl a
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asl a
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sta fleaTileOffsets
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sta fleaTileOffsets+4
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@ -161,5 +207,12 @@ fleaTileOffsets dc i2'0'
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dc i2'0'
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dc i2'0'
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fleaHeightInTile dc i2'0'
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fleaSpriteCounter dc i2'0'
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fleaSprite dc i2'0'
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fleaJumpTable dc i4'flea1'
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dc i4'flea2'
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dc i4'flea3'
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dc i4'flea4'
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end
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@ -28,6 +28,7 @@
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/* Globals */
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unsigned int userid;
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unsigned int randomSeed;
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/* Implementation */
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@ -53,7 +54,11 @@ int main(void)
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NewHandle(0x9000, userid, attrLocked | attrFixed | attrAddr | attrBank, (Pointer)0x011000);
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TOOLFAIL("Unable to allocate SHR screen");
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srand((int)(time(NULL)));
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randomSeed = (int)time(NULL);
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if (randomSeed == 0)
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randomSeed = 1;
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srand(randomSeed);
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randInit();
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initTiles();
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initNonGameTiles();
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58
BuGS/random.s
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58
BuGS/random.s
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@ -0,0 +1,58 @@
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;
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; random.s
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; BuGS
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;
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; Created by Jeremy Rand on 2020-07-19.
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;Copyright © 2020 Jeremy Rand. All rights reserved.
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;
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case on
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mcopy random.macros
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keep random
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random start
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randInit entry
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lda randomSeed
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sta seed65535
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and #$1f
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bne randInit_store32
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lda #$1f
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randInit_store32 anop
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sta seed32
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rtl
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; Returns a number from 1 to 31
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rand32 entry
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lda seed32
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lsr a
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bcc skipEor32
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eor #$0014
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skipEor32 anop
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sta seed32
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rtl
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; returns a number from 0 to 24
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rand25 entry
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jsl rand32
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dec a
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cmp #25
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bge rand25
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rtl
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; Returns a number from 1 to 65535
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rand65535 entry
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lda seed65535
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lsr a
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bcc skipEor65535
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eor #$b400
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skipEor65535 anop
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sta seed65535
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rtl
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seed65535 dc i2'0'
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seed32 dc i2'0'
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end
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