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Add key states

This commit is contained in:
Miloslav Číž 2019-10-14 15:56:26 +02:00
parent 1640902e21
commit 24c93368de
1 changed files with 56 additions and 23 deletions
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79
main.c
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@ -25,6 +25,7 @@
#define SFG_KEY_A 4
#define SFG_KEY_B 5
#define SFG_KEY_C 6
/*
The following keys are optional for a platform to implement. They just make
the controls more comfortable.
@ -34,6 +35,14 @@
#define SFG_KEY_STRAFE_RIGHT 9
#define SFG_KEY_MAP 10
#define SFG_KEY_COUNT 10 ///< Number of keys.
/**
Pressed states of keys, LSB of each value means current pessed states, other
bits store states in previous frames.
*/
uint8_t SFG_keyStates[SFG_KEY_COUNT];
/* ============================= PORTING =================================== */
/* When porting, do the following:
@ -205,6 +214,24 @@ uint8_t SFG_zBuffer[SFG_Z_BUFFER_SIZE];
int8_t SFG_backgroundScaleMap[SFG_GAME_RESOLUTION_Y];
uint16_t SFG_backgroundScroll;
// TODO: move globals to a gloabl struct?
/**
Says whether given key is currently pressed (down). This should be preferred
to SFG_keyPressed().
*/
uint8_t SFG_keyIsDown(uint8_t key)
{
return SFG_keyStates[key] & 0x01;
}
/**
Says whether given key has been pressed in the current frame.
*/
uint8_t SFG_keyJustPressed(uint8_t key)
{
return (SFG_keyStates[key] & 0x03) == 1;
}
struct
{
@ -858,6 +885,9 @@ void SFG_init()
SFG_backgroundScaleMap[i] =
(i * SFG_TEXTURE_SIZE) / SFG_GAME_RESOLUTION_Y;
for (uint8_t i = 0; i < SFG_KEY_DOWN; ++i)
SFG_keyStates[i] = 0;
SFG_backgroundScroll = 0;
SFG_setAndInitLevel(&SFG_level0);
@ -877,6 +907,9 @@ void SFG_playerRotateWeapon(uint8_t next)
*/
void SFG_gameStep()
{
for (uint8_t i = 0; i < SFG_KEY_COUNT; ++i)
SFG_keyStates[i] = (SFG_keyStates[i] << 1) | SFG_keyPressed(i);
int8_t recomputeDirection = 0;
RCL_Vector2D moveOffset;
@ -892,9 +925,9 @@ void SFG_gameStep()
int8_t shearing = 0;
if (SFG_keyPressed(SFG_KEY_A))
if (SFG_keyIsDown(SFG_KEY_A))
{
if (SFG_keyPressed(SFG_KEY_UP))
if (SFG_keyIsDown(SFG_KEY_UP))
{
SFG_player.camera.shear =
RCL_min(SFG_CAMERA_MAX_SHEAR_PIXELS,
@ -902,7 +935,7 @@ void SFG_gameStep()
shearing = 1;
}
else if (SFG_keyPressed(SFG_KEY_DOWN))
else if (SFG_keyIsDown(SFG_KEY_DOWN))
{
SFG_player.camera.shear =
RCL_max(-1 * SFG_CAMERA_MAX_SHEAR_PIXELS,
@ -911,31 +944,31 @@ void SFG_gameStep()
shearing = 1;
}
if (!SFG_keyPressed(SFG_KEY_C))
if (!SFG_keyIsDown(SFG_KEY_C))
{
if (SFG_keyPressed(SFG_KEY_LEFT))
if (SFG_keyIsDown(SFG_KEY_LEFT))
strafe = -1;
else if (SFG_keyPressed(SFG_KEY_RIGHT))
else if (SFG_keyIsDown(SFG_KEY_RIGHT))
strafe = 1;
}
else
{
if (SFG_keyPressed(SFG_KEY_LEFT))
if (SFG_keyJustPressed(SFG_KEY_LEFT))
SFG_playerRotateWeapon(0);
else if (SFG_keyPressed(SFG_KEY_RIGHT))
else if (SFG_keyJustPressed(SFG_KEY_RIGHT))
SFG_playerRotateWeapon(1);
}
}
else
{
if (!SFG_keyPressed(SFG_KEY_C))
if (!SFG_keyIsDown(SFG_KEY_C))
{
if (SFG_keyPressed(SFG_KEY_LEFT))
if (SFG_keyIsDown(SFG_KEY_LEFT))
{
SFG_player.camera.direction -= SFG_PLAYER_TURN_UNITS_PER_FRAME;
recomputeDirection = 1;
}
else if (SFG_keyPressed(SFG_KEY_RIGHT))
else if (SFG_keyIsDown(SFG_KEY_RIGHT))
{
SFG_player.camera.direction += SFG_PLAYER_TURN_UNITS_PER_FRAME;
recomputeDirection = 1;
@ -943,16 +976,16 @@ void SFG_gameStep()
}
else
{
if (SFG_keyPressed(SFG_KEY_LEFT))
if (SFG_keyJustPressed(SFG_KEY_LEFT))
SFG_playerRotateWeapon(0);
else if (SFG_keyPressed(SFG_KEY_RIGHT))
else if (SFG_keyJustPressed(SFG_KEY_RIGHT))
SFG_playerRotateWeapon(1);
}
if (recomputeDirection)
SFG_recompurePLayerDirection();
if (SFG_keyPressed(SFG_KEY_UP))
if (SFG_keyIsDown(SFG_KEY_UP))
{
moveOffset.x += SFG_player.direction.x;
moveOffset.y += SFG_player.direction.y;
@ -960,7 +993,7 @@ void SFG_gameStep()
bobbing = 1;
#endif
}
else if (SFG_keyPressed(SFG_KEY_DOWN))
else if (SFG_keyIsDown(SFG_KEY_DOWN))
{
moveOffset.x -= SFG_player.direction.x;
moveOffset.y -= SFG_player.direction.y;
@ -970,21 +1003,21 @@ void SFG_gameStep()
}
}
if (SFG_keyPressed(SFG_KEY_STRAFE_LEFT))
if (SFG_keyIsDown(SFG_KEY_STRAFE_LEFT))
strafe = -1;
else if (SFG_keyPressed(SFG_KEY_STRAFE_RIGHT))
else if (SFG_keyIsDown(SFG_KEY_STRAFE_RIGHT))
strafe = 1;
if (strafe != 0)
{
moveOffset.x = strafe * SFG_player.direction.y;
moveOffset.y = -1 * strafe * SFG_player.direction.x;
moveOffset.x += strafe * SFG_player.direction.y;
moveOffset.y -= strafe * SFG_player.direction.x;
}
#if SFG_PREVIEW_MODE
if (SFG_keyPressed(SFG_KEY_B))
if (SFG_keyIsDown(SFG_KEY_B))
SFG_player.verticalSpeed = SFG_PLAYER_MOVE_UNITS_PER_FRAME;
else if (SFG_keyPressed(SFG_KEY_C))
else if (SFG_keyIsDown(SFG_KEY_C))
SFG_player.verticalSpeed = -1 * SFG_PLAYER_MOVE_UNITS_PER_FRAME;
else
SFG_player.verticalSpeed = 0;
@ -992,8 +1025,8 @@ void SFG_gameStep()
RCL_Unit verticalOffset =
(
(
SFG_keyPressed(SFG_KEY_JUMP) ||
(SFG_keyPressed(SFG_KEY_UP) && SFG_keyPressed(SFG_KEY_C))
SFG_keyIsDown(SFG_KEY_JUMP) ||
(SFG_keyIsDown(SFG_KEY_UP) && SFG_keyIsDown(SFG_KEY_C))
) &&
(SFG_player.verticalSpeed == 0) &&
(SFG_player.previousVerticalSpeed == 0)) ?