bouncy fpga game
www.youtube.com/watch?v=IiLWF3GbV7w
feat: update python to be in sync
+55
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+55
-47
visualizer.py
+55
-47
visualizer.py
···
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# --- Physics constants (match VHDL exactly) ---
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GRAVITY = 1
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IMPULSE = 3
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+
SLAM_FORCE = 8
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AIR_CONTROL = 2
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JUMP_FORCE = 13
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MAX_VEL_X = 32
···
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# Holding W while bouncing: boost each ground contact
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if keys_held['w'] and jump_pressed and on_ground:
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vy = (vy - 4) & MASK
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vy = (vy - JUMP_FORCE) & MASK
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# S: slam (air only)
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if keys_held['s'] and not on_ground:
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vy = (vy + IMPULSE) & MASK
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vy = (vy + SLAM_FORCE) & MASK
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# A/D
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if keys_held['a']:
···
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# Clamp Y
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svy = to_signed(vy)
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if svy > 63: svy = 63
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elif svy < -64: svy = -64
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if svy > 80: svy = 80
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elif svy < -100: svy = -100
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vy = to_unsigned(svy)
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# Update position
···
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svx += (-svx) >> BOUNCE_SHIFT
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vx = to_unsigned(svx)
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# --- Obstacle collisions ---
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# --- Obstacle collisions (entry-face detection using prev position) ---
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prev_top = char_y - SIZE
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prev_bot = char_y + SIZE
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prev_left = char_x - SIZE
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prev_right = char_x + SIZE
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for (ol, ot, orr, ob) in OBSTACLES:
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c_left = px - SIZE
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c_right = px + SIZE
···
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c_bot = py + SIZE
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if c_right >= ol and c_left <= orr and c_bot >= ot and c_top <= ob:
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# Compute overlap from velocity direction
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svx_now = to_signed(vx)
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svy_now = to_signed(vy)
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if svx_now >= 0:
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overlap_x = c_right - ol
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else:
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overlap_x = orr - c_left
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if svy_now >= 0:
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overlap_y = c_bot - ot
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else:
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overlap_y = ob - c_top
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if overlap_y <= overlap_x:
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# Vertical resolution
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if svy_now >= 0: # moving down
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py = ot - SIZE
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grounded = True
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else: # moving up
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py = ob + SIZE
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if prev_bot <= ot:
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# Entered from top
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py = ot - SIZE; grounded = True
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bounced = True
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bounce_speed = abs(svy_now)
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bounce_speed = abs(to_signed(vy))
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vy = negate(vy)
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svy = to_signed(vy)
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# Energy loss on magnitude
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if abs(svy) > 1:
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svy_abs = abs(svy)
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loss = svy_abs >> BOUNCE_SHIFT
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if svy > 0:
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svy -= loss
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else:
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svy += loss
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if abs(svy) < 2:
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svy = 0
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loss = abs(svy) >> BOUNCE_SHIFT
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svy = svy - loss if svy > 0 else svy + loss
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if abs(svy) < 2: svy = 0
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vy = to_unsigned(svy)
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else:
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# Horizontal resolution
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if svx_now >= 0:
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px = ol - SIZE
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else:
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px = orr + SIZE
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elif prev_top >= ob:
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# Entered from bottom
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py = ob + SIZE
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bounced = True
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vy = negate(vy)
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svy = to_signed(vy)
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if svy > 1:
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svy -= svy >> BOUNCE_SHIFT
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vy = to_unsigned(svy)
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elif prev_right <= ol:
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# Entered from left
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px = ol - SIZE
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bounced = True; bounce_wall = True
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bounce_speed = abs(to_signed(vx))
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vx = negate(vx)
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svx = to_signed(vx)
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if svx > 1: svx -= svx >> BOUNCE_SHIFT
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elif svx < -1: svx += (-svx) >> BOUNCE_SHIFT
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vx = to_unsigned(svx)
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elif prev_left >= orr:
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# Entered from right
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px = orr + SIZE
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bounced = True; bounce_wall = True
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bounce_speed = abs(svx_now)
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bounce_speed = abs(to_signed(vx))
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vx = negate(vx)
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svx = to_signed(vx)
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if svx > 1:
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svx -= svx >> BOUNCE_SHIFT
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elif svx < -1:
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svx += (-svx) >> BOUNCE_SHIFT
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if svx > 1: svx -= svx >> BOUNCE_SHIFT
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elif svx < -1: svx += (-svx) >> BOUNCE_SHIFT
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vx = to_unsigned(svx)
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else:
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# Corner/inside fallback
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svy_now = to_signed(vy)
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if svy_now >= 0: py = ot - SIZE; grounded = True
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else: py = ob + SIZE
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bounced = True
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vy = negate(vy)
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svy = to_signed(vy)
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if abs(svy) > 1:
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loss = abs(svy) >> BOUNCE_SHIFT
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svy = svy - loss if svy > 0 else svy + loss
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vy = to_unsigned(svy)
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# Commit
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char_x = px