bouncy fpga game
www.youtube.com/watch?v=IiLWF3GbV7w
chore: fix phasing though obstacles at high velocity
+17
-5
+17
-5
physics_engine.vhd
+17
-5
physics_engine.vhd
···
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variable vx, vy : std_logic_vector(9 downto 0);
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variable px, py : std_logic_vector(10 downto 0);
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variable bounced : std_logic;
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variable bounce_wall : std_logic;
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variable bounce_speed : std_logic_vector(9 downto 0);
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variable grounded : std_logic;
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variable bounce_wall : std_logic;
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variable c_left, c_right, c_top, c_bot : std_logic_vector(10 downto 0);
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variable c_prev_top, c_prev_bot, c_prev_left, c_prev_right : std_logic_vector(10 downto 0);
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variable tcx, tcy, dcx, dcy : std_logic_vector(10 downto 0);
···
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c_top := py - SIZE11;
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c_bot := py + SIZE11;
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if c_right >= OBS_L(obs_i) and c_left <= OBS_R(obs_i) and
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c_bot >= OBS_T(obs_i) and c_top <= OBS_B(obs_i) then
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-- 1. Swept Horizontal Overlap
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if vx(9) = '0' then -- moving right
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x_overlap := (c_right >= OBS_L(obs_i)) and (c_prev_left <= OBS_R(obs_i));
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else -- moving left
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x_overlap := (c_prev_right >= OBS_L(obs_i)) and (c_left <= OBS_R(obs_i));
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end if;
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-- 2. Swept Vertical Overlap
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if vy(9) = '0' then -- moving down (gravity is positive)
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y_overlap := (c_bot >= OBS_T(obs_i)) and (c_prev_top <= OBS_B(obs_i));
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else -- moving up
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y_overlap := (c_prev_bot >= OBS_T(obs_i)) and (c_top <= OBS_B(obs_i));
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end if;
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-- 3. Check collision using the swept bounds
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if x_overlap and y_overlap then
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if c_prev_bot <= OBS_T(obs_i) then
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-- Entered from top → land on surface