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Add jumping

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This commit is contained in:
Miloslav Číž 2019-10-03 20:09:00 +02:00
parent 438c7075b0
commit 82ab9bcb01
2 changed files with 23 additions and 3 deletions
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6
constants.h
View File

@ -17,6 +17,12 @@
#define SFG_GRAVITY_ACCELERATION 30 #define SFG_GRAVITY_ACCELERATION 30
/**
Initial upwards speed of player's jump, in squares per second.
*/
#define SFG_PLAYER_JUMP_SPEED 80
/** /**
How quickly elevators and squeezers move, in RCL_Unit per second. How quickly elevators and squeezers move, in RCL_Unit per second.
*/ */

20
main.c
View File

@ -111,6 +111,9 @@ struct
RCL_Camera camera; RCL_Camera camera;
RCL_Vector2D direction; RCL_Vector2D direction;
RCL_Unit verticalSpeed; RCL_Unit verticalSpeed;
RCL_Unit previousVerticalSpeed; /**< Vertical speed in previous frame, needed
for determining whether player is in the
air. */
} SFG_player; } SFG_player;
void SFG_recompurePLayerDirection() void SFG_recompurePLayerDirection()
@ -138,6 +141,7 @@ void SFG_initPlayer()
SFG_recompurePLayerDirection(); SFG_recompurePLayerDirection();
SFG_player.verticalSpeed = 0; SFG_player.verticalSpeed = 0;
SFG_player.previousVerticalSpeed = 0;
} }
RCL_RayConstraints SFG_rayConstraints; RCL_RayConstraints SFG_rayConstraints;
@ -516,7 +520,11 @@ void SFG_gameStep()
else else
SFG_player.verticalSpeed = 0; SFG_player.verticalSpeed = 0;
#else #else
SFG_player.verticalSpeed -= SFG_GRAVITY_SPEED_INCREASE_PER_FRAME; RCL_Unit verticalOffset =
(SFG_keyPressed(SFG_KEY_JUMP) && (SFG_player.verticalSpeed == 0) &&
(SFG_player.previousVerticalSpeed == 0)) ?
SFG_PLAYER_JUMP_SPEED :
(SFG_player.verticalSpeed - SFG_GRAVITY_SPEED_INCREASE_PER_FRAME);
#endif #endif
if (SFG_keyPressed(SFG_KEY_UP)) if (SFG_keyPressed(SFG_KEY_UP))
@ -543,10 +551,16 @@ void SFG_gameStep()
SFG_PREVIEW_MODE_SPEED_MULTIPLIER * SFG_player.verticalSpeed; SFG_PREVIEW_MODE_SPEED_MULTIPLIER * SFG_player.verticalSpeed;
#else #else
RCL_moveCameraWithCollision(&(SFG_player.camera),moveOffset, RCL_moveCameraWithCollision(&(SFG_player.camera),moveOffset,
SFG_player.verticalSpeed,SFG_floorHeightAt,SFG_ceilingHeightAt,1,1); verticalOffset,SFG_floorHeightAt,SFG_ceilingHeightAt,1,1);
SFG_player.previousVerticalSpeed = SFG_player.verticalSpeed;
RCL_Unit limit = RCL_max(RCL_max(0,verticalOffset),SFG_player.verticalSpeed);
SFG_player.verticalSpeed = SFG_player.verticalSpeed =
RCL_min(0,SFG_player.camera.height - previousHeight); RCL_min(limit,SFG_player.camera.height - previousHeight);
/* ^ By "limit" we assure height increase caused by climbing a step doesn't
add vertical velocity. */
#endif #endif
} }