'Physics', jump arc
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Jaidyn Ann
parent
cc4cf42cf0
commit
ac8792ff3b
109
sbp.mfk
109
sbp.mfk
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@ -2,7 +2,6 @@
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// SUPERPANSKATOL'
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// Based on Garydos'es Pong example
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import random
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import nes_joy
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segment(chrrom) const array graphics @ $0000 = file("tileset.chr")
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@ -25,9 +24,13 @@ struct Entity {
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Sprite top1, // right side, please kill me
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Sprite bottom1,
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// all this can be crammed into a byte (if merge dircount w frame) `o`
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// note to self: do that
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byte movement, // 0-3; idle, walk, jump/fall
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byte direction,
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byte frame // internal count used for animation
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byte jump, // 0/1
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byte direction, // 0/1
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byte dircount, // counter for time-limited movement; i.e., jumping
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byte frame // internal count used for animation; max 5
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}
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// ============================================================================
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@ -86,7 +89,8 @@ const byte LEFTWALL = $04
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// -------------------------------------
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// i don't actually remember if the super crate box guy is named sam or not
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// or if he even has a name?
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const byte SAM_HEIGHT = $20 // height of each paddle in pixels
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const byte SAM_WALKSPEED = 2
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const byte SAM_FALLSPEED = 4
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const byte SAM_ATTR = %00000001
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const byte SAM_ATTR_HFLIP = %01000001
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const byte SAM_ATTR_VFLIP = %10000001
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@ -118,6 +122,7 @@ const array SAM_WALK = [ $64, $74, $65, $75,
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// quite important uwu
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void main() {
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sam.dircount = 0
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gamestate = STATETITLE
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title_init()
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while(true){} // all work is done in nmi
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@ -257,8 +262,6 @@ void title_init() {
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void title_logic() {
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read_joy1()
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if input_start != 0 {
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rand_seed = framecounter //seed the random number generator with the amount of frames
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//that have passed since the title screen was shown
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gamestate = STATEPLAYING
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ingame_init()
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return
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@ -287,6 +290,9 @@ void ingame_init() {
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//re-enable the screen and nmi
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ppu_ctrl = %10010000 // enable NMI, sprites from Pattern Table 0, background from Pattern Table 1
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ppu_mask = %00011110 // enable sprites, enable background, no clipping on left side
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sam.top0.y = 40
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sam.top0.x = 50
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}
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void ingame_logic() {
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@ -316,38 +322,28 @@ void ingame_input ( ) {
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read_joy1()
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sam.movement = 0
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// up
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if input_dy < 0 {
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if (sam.top0.y > TOPWALL) {
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sam.top0.y -= 2
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}
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}
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// down
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else if input_dy > 0 {
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if (sam.top0.y + SAM_HEIGHT) < BOTTOMWALL {
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sam.top0.y += 2
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}
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}
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// left
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if input_dx < 0 {
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if ( input_dx < 0 ) {
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sam.direction = 0
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sam.top0.x -= 2
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sam.movement = 1
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}
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// right
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else if input_dx > 0 {
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else if ( input_dx > 0 ) {
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sam.direction = 1
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sam.top0.x += 2
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sam.movement = 1
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}
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// a button
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if ( input_btn == 1 && sam.jump == 0 ) {
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sam.jump = 1
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sam.dircount = 0
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}
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}
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void update_ingame_sprites ( )
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{
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// player. sam is the player.
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update_entity( pointer.Entity( sam.addr ),
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sam.top0.x, sam.top0.y, SAM_IDLE, SAM_WALK)
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update_entity( pointer.Entity( sam.addr ), SAM_IDLE, SAM_WALK )
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}
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macro void load_ingame_attr_table() {
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@ -452,8 +448,13 @@ macro void draw_boundaries_background() {
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// -------------------------------------
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// SPRITES
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// -------------------------------------
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void update_entity ( pointer.Entity ent, pointer idle, pointer walk ) {
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entity_physics( ent )
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entity_sprite( ent, ent[0].top0.x, ent[0].top0.y, idle, walk )
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}
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// sets the current frame of ent's animation and determines which animation to use
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void update_entity ( pointer.Entity ent, byte xx, byte yy, pointer idle, pointer walk ) {
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void entity_sprite ( pointer.Entity ent, byte xx, byte yy, pointer idle, pointer walk ) {
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if ( ent[0].direction == 0 ) {
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ent[0].top0.attrs = SAM_ATTR_HFLIP
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ent[0].bottom0.attrs = SAM_ATTR_HFLIP
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@ -498,7 +499,12 @@ void update_entity ( pointer.Entity ent, byte xx, byte yy, pointer idle, pointer
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ani = 0
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}
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if ( ent[0].movement == 1 ) {
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if ( ent[0].jump == 1 ) {
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ent[0].top0.tile = idle[0]
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ent[0].bottom0.tile = idle[1]
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ent[0].top1.tile = idle[2]
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ent[0].bottom1.tile = idle[3]
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} else if ( ent[0].movement == 1 ) {
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ent[0].top0.tile = walk[ani + 0]
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ent[0].bottom0.tile = walk[ani + 1]
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ent[0].top1.tile = walk[ani + 2]
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@ -513,6 +519,54 @@ void update_entity ( pointer.Entity ent, byte xx, byte yy, pointer idle, pointer
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ent[0].frame += 1
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}
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// -------------------------------------
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// "PHYSICS"
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// -------------------------------------
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void entity_physics ( pointer.Entity ent ) {
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if ( ent[0].bottom0.y < BOTTOMWALL - 10 && ent[0].jump == 1 && ent[0].dircount == 0 ) {
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// if not on ground, don't start jumping
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ent[0].jump = 0
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} else if ( ent[0].jump == 1 )
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{
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// a meager attempt at replicating scb's jump arc
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// a few deficiencies:
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// * a bit too short
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// * "float" is a bit too short
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// it might work out gameplay-wise, though, so idk we'll see
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if ( ent[0].dircount < 3) {
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ent[0].top0.y -= 6
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} else if ( ent[0].dircount == 3 ) {
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ent[0].top0.y -= 2
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} else if ( ent[0].dircount == 4 ) {
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ent[0].top0.y -= 6
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} else if ( ent[0].dircount < 9 ) {
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ent[0].top0.y -= 3
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} else if ( 9 <= ent[0].dircount <= 10 ) {
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ent[0].top0.y -= 1
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} else if ( ent[0].dircount == 13 ) {
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ent[0].top0.y += 2
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} else if ( 13 < ent[0].dircount < 20 ) {
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ent[0].top0.y += 2
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} else if ( 20 < ent[0].dircount ) {
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ent[0].dircount = -1
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ent[0].jump = 0
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}
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ent[0].dircount += 1
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}
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if ( ent[0].bottom0.y < BOTTOMWALL - 10 && ent[0].jump == 0 ) {
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ent[0].top0.y += SAM_FALLSPEED
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}
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if ( ent[0].movement == 1 ) {
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if ( ent[0].direction == 0 ) {
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ent[0].top0.x -= SAM_WALKSPEED
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} else if ( ent[0].direction == 1) {
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ent[0].top0.x += SAM_WALKSPEED
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}
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}
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}
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// -------------------------------------
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// ETC
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// -------------------------------------
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@ -537,7 +591,6 @@ inline void draw_score() {
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// ============================================================================
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// UTIL
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// ============================================================================
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inline asm void ppu_wait_vblank() {
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vblankwait:
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BIT $2002
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