bouncy fpga game
www.youtube.com/watch?v=IiLWF3GbV7w
chore: make the intail jump stronger
+21
-16
+15
-11
physics_engine.vhd
+15
-11
physics_engine.vhd
···
52
52
-- Physics tuning
53
53
constant GRAVITY : std_logic_vector(9 downto 0) := CONV_STD_LOGIC_VECTOR(1, 10);
54
54
constant IMPULSE : std_logic_vector(9 downto 0) := CONV_STD_LOGIC_VECTOR(3, 10);
55
-
constant SLAM_FORCE : std_logic_vector(9 downto 0) := CONV_STD_LOGIC_VECTOR(4, 10);
56
-
-- Jump: base force at zero velocity, tapers off as |vel_y| rises.
55
+
constant SLAM_FORCE : std_logic_vector(9 downto 0) := CONV_STD_LOGIC_VECTOR(4, 10);
56
+
-- Initial jump: full force at zero velocity, tapers off as |vel_y| rises.
57
57
-- Piecewise lookup approximates: max(JUMP_MIN, JUMP_BASE*JUMP_SCALE/(JUMP_SCALE+|vy|))
58
-
constant JUMP_BASE : integer := 6; -- force at zero velocity
59
-
constant JUMP_VEL_THR1 : integer := 3; -- |vy| <= 3 → force 6
60
-
constant JUMP_VEL_THR2 : integer := 8; -- |vy| <= 8 → force 4
61
-
constant JUMP_VEL_THR3 : integer := 16; -- |vy| <= 16 → force 3
62
-
constant JUMP_MIN_FORCE : integer := 2; -- floor at high velocity
58
+
constant JUMP_BASE : integer := 14; -- force at zero velocity
59
+
constant JUMP_VEL_THR1 : integer := 3; -- |vy| <= 3 → force 14
60
+
constant JUMP_VEL_THR2 : integer := 10; -- |vy| <= 10 → force 8
61
+
constant JUMP_VEL_THR3 : integer := 20; -- |vy| <= 20 → force 6
62
+
constant JUMP_MIN_FORCE : integer := 4; -- floor at high velocity
63
+
-- Trampoline: fixed additive boost on each ground contact while W held.
64
+
-- No inverse scaling so energy accumulates each bounce.
65
+
constant JUMP_BOUNCE : std_logic_vector(9 downto 0) := CONV_STD_LOGIC_VECTOR(6, 10);
63
66
constant MAX_VEL_X : std_logic_vector(9 downto 0) := CONV_STD_LOGIC_VECTOR(32, 10);
64
67
65
68
-- World bounds (11-bit)
···
157
160
-- == INPUT ==
158
161
if key_w = '0' then jump_pressed <= '0'; end if;
159
162
160
-
-- Scaled jump: full force at low velocity, tapers as |vy| increases
163
+
-- Initial jump: force tapers as |vy| increases (inverse scaling)
161
164
if vy(9) = '1' then abs_vy_int := CONV_INTEGER((not vy) + 1);
162
165
else abs_vy_int := CONV_INTEGER(vy); end if;
163
166
if abs_vy_int <= JUMP_VEL_THR1 then jforce_int := JUMP_BASE;
164
-
elsif abs_vy_int <= JUMP_VEL_THR2 then jforce_int := 4;
165
-
elsif abs_vy_int <= JUMP_VEL_THR3 then jforce_int := 3;
167
+
elsif abs_vy_int <= JUMP_VEL_THR2 then jforce_int := 8;
168
+
elsif abs_vy_int <= JUMP_VEL_THR3 then jforce_int := 6;
166
169
else jforce_int := JUMP_MIN_FORCE;
167
170
end if;
168
171
jforce_slv := CONV_STD_LOGIC_VECTOR(jforce_int, 10);
···
173
176
jump_pressed <= '1';
174
177
end if;
175
178
179
+
-- Trampoline: fixed boost (no inverse scaling) so energy accumulates each bounce
176
180
if key_w = '1' and jump_pressed = '1' and on_ground = '1' then
177
-
vy := vy - jforce_slv;
181
+
vy := vy - JUMP_BOUNCE;
178
182
end if;
179
183
180
184
if key_s = '1' and on_ground = '0' then vy := vy + SLAM_FORCE; end if;
+6
-5
visualizer.py
+6
-5
visualizer.py
···
25
25
IMPULSE = 3
26
26
SLAM_FORCE = 4
27
27
AIR_CONTROL = 2
28
-
JUMP_FORCE = 6 # base jump force at zero velocity
29
-
JUMP_VEL_SCALE = 12 # velocity magnitude at which jump force is halved
30
-
JUMP_MIN_FORCE = 2 # floor: minimum jump force regardless of velocity
28
+
JUMP_FORCE = 14 # initial jump force at zero velocity (scales down with |vel_y|)
29
+
JUMP_VEL_SCALE = 12 # velocity magnitude at which initial jump force is halved
30
+
JUMP_MIN_FORCE = 4 # floor for inverse-scaled initial jump
31
+
JUMP_BOUNCE = 6 # fixed additive boost on each ground contact while W held (trampoline)
31
32
MAX_VEL_X = 32
32
33
SIZE = 7
33
34
BOUNCE_SHIFT = 3 # energy loss = vel >> 3 (keep 87.5%)
···
140
141
vy = (vy - scaled_jump()) & MASK
141
142
jump_pressed = True
142
143
elif keys_held['w'] and jump_pressed and on_ground:
143
-
# Holding W while bouncing: boost each ground contact
144
-
vy = (vy - scaled_jump()) & MASK
144
+
# Holding W while bouncing: fixed boost so trampoline accumulates each contact
145
+
vy = (vy - JUMP_BOUNCE) & MASK
145
146
146
147
# S: slam (air only)
147
148
if keys_held['s'] and not on_ground: