Add bob shear

game.h

@@ -4301,7 +4301,7 @@ void SFG_drawMenu()
     if (item == SFG_MENU_ITEM_NONE)
       break;
 
-# if SFG_GAME_RESOLUTION_Y < 70
+#if SFG_GAME_RESOLUTION_Y < 70
     // with low resolution only display the selected item
 
     if (i != SFG_game.selectedMenuItem)
@@ -4504,12 +4504,21 @@ void SFG_draw()
 #if SFG_HEADBOB_ENABLED
     RCL_Unit headBobOffset = 0;
 
+#if SFG_HEADBOB_SHEAR != 0
+    int16_t headBobShearOffset;
+#endif
+
     if (SFG_game.state != SFG_GAME_STATE_LOSE)
     {
       RCL_Unit bobSin = RCL_sin(SFG_player.headBobFrame);
 
       headBobOffset = (bobSin * SFG_HEADBOB_OFFSET) / RCL_UNITS_PER_SQUARE;
 
+#if SFG_HEADBOB_SHEAR != 0
+      headBobShearOffset = (bobSin * SFG_HEADBOB_SHEAR) / RCL_UNITS_PER_SQUARE;
+      SFG_player.camera.shear += headBobShearOffset;
+#endif
+
       weaponBobOffset =
         (bobSin * SFG_WEAPONBOB_OFFSET_PIXELS) / (RCL_UNITS_PER_SQUARE) + 
         SFG_WEAPONBOB_OFFSET_PIXELS;
@@ -4527,7 +4536,7 @@ void SFG_draw()
     // add head bob just for the rendering (we'll will substract it back later)
 
     SFG_player.camera.height += headBobOffset;
-#endif
+#endif // headbob enabled?
 
     RCL_renderComplex(
       SFG_player.camera,
@@ -4673,8 +4682,13 @@ void SFG_draw()
 #if SFG_HEADBOB_ENABLED
     // after rendering sprites substract back the head bob offset
     SFG_player.camera.height -= headBobOffset;
+
+#if SFG_HEADBOB_SHEAR != 0
+    SFG_player.camera.shear -= headBobShearOffset;
 #endif
 
+#endif // head bob enabled?
+
 #if SFG_PREVIEW_MODE == 0
     SFG_drawWeapon(weaponBobOffset);
 #endif

main_sdl.c

@@ -33,6 +33,9 @@
   #define SFG_REVEAL_MAP 1
 //  #define SFG_INFINITE_AMMO 1
 
+  #define SFG_SCREEN_RESOLUTION_X 800
+  #define SFG_SCREEN_RESOLUTION_Y 600
+
 //  #define SFG_SCREEN_RESOLUTION_X 88
 //  #define SFG_SCREEN_RESOLUTION_Y 110
 
@@ -45,6 +48,7 @@
 */
 #define SFG_PLAYER_DAMAGE_MULTIPLIER 1024
 #define SFG_DITHERED_SHADOW 1
+#define SFG_HEADBOB_SHEAR (-1 * SFG_SCREEN_RESOLUTION_Y / 80)
 
 #define MUSIC_VOLUME 64
 

settings.h

@@ -69,7 +69,7 @@
 /**
   How quickly player turns left/right, in degrees per second.
 */
-#define SFG_PLAYER_TURN_SPEED 210
+#define SFG_PLAYER_TURN_SPEED 180
 
 /**
   Distance, in RCL_Units, to which textures will be drawn. Textures behind this
@@ -177,6 +177,14 @@
   #define SFG_HEADBOB_OFFSET 200
 #endif
 
+/**
+  If head bob is on, this additionally sets additional camera shear bob, in
+  pixels, which can make bobbing look more "advanced". 0 turns this option off.
+*/
+#ifndef SFG_HEADBOB_SHEAR
+  #define SFG_HEADBOB_SHEAR 0
+#endif
+
 /**
   Weapon bobbing offset in weapon image pixels.
 */