port: implement screen shake

src/game/explosions.c

@@ -28,6 +28,12 @@
 #include "data.h"
 #include "types.h"
 
+#ifdef PLATFORM_N64
+#define SHAKE_TIME 6
+#else
+#define SHAKE_TIME 12
+#endif
+
 struct explosion *g_Explosions;
 s32 g_MaxExplosions;
 
@@ -296,7 +302,7 @@ bool explosionCreate(struct prop *sourceprop, struct coord *exppos, RoomNum *exp
 		struct prop *expprop = propAllocate();
 
 		if (type != EXPLOSIONTYPE_16 && type != EXPLOSIONTYPE_BULLETHOLE) {
-			g_ExplosionShakeTotalTimer = 6;
+			g_ExplosionShakeTotalTimer = SHAKE_TIME;
 		}
 
 		if (expprop) {
@@ -554,8 +560,8 @@ bool explosionCreate(struct prop *sourceprop, struct coord *exppos, RoomNum *exp
  */
 void explosionShake(void)
 {
-	g_ExplosionShakeTotalTimer = 6;
-	g_ExplosionShakeIntensityTimer = 6;
+	g_ExplosionShakeTotalTimer = SHAKE_TIME;
+	g_ExplosionShakeIntensityTimer = SHAKE_TIME;
 }
 
 void explosionsUpdateShake(struct coord *arg0, struct coord *arg1, struct coord *arg2)

src/include/data.h

@@ -536,6 +536,7 @@ extern f32 g_PlayerDefaultFovY;
 extern s32 g_PlayerMouseAimMode;
 extern f32 g_PlayerMouseAimSpeedX;
 extern f32 g_PlayerMouseAimSpeedY;
+extern f32 g_ViShakeIntensityMult;
 extern u32 g_TexFilter2D;
 
 #define TEX_FILTER_2D g_TexFilter2D

src/lib/vi.c

@@ -14,6 +14,9 @@
 #include "lib/mtx.h"
 #include "data.h"
 #include "types.h"
+#ifndef PLATFORM_N64
+#include "video.h"
+#endif
 
 #define TO_U16_A(x) ((u16)(x))
 #define TO_U16_B(x) ((x) & 0xffff)
@@ -280,6 +283,10 @@ void viHandleRetrace(void)
 	osSetIntMask(prevmask);
 #endif
 
+#ifndef PLATFORM_N64
+	videoSetWindowOffset(0, offset);
+#endif
+
 	osViSetMode(var8008dd60[1 - var8005ce74]);
 	osViBlack(g_ViUnblackTimer);
 	osViSetXScale(g_ViXScalesBySlot[1 - var8005ce74]);
@@ -460,8 +467,13 @@ void viShake(f32 intensity)
 		intensity = 0;
 	}
 
+#ifdef PLATFORM_N64
 	g_ViShakeIntensity = intensity;
 	g_ViShakeTimer = 10;
+#else
+	g_ViShakeIntensity = intensity * g_ViShakeIntensityMult;
+	g_ViShakeTimer = 20;
+#endif
 }
 
 void viSetMode(s32 mode)