mirror of
https://github.com/Ninjdai1/pokeemerald.git
synced 2024-12-26 03:34:15 +01:00
506 lines
15 KiB
C
506 lines
15 KiB
C
#include "global.h"
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#include "berry.h"
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#include "bike.h"
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#include "field_camera.h"
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#include "field_player_avatar.h"
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#include "fieldmap.h"
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#include "event_object_movement.h"
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#include "gpu_regs.h"
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#include "menu.h"
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#include "overworld.h"
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#include "rotating_gate.h"
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#include "sprite.h"
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#include "text.h"
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EWRAM_DATA bool8 gUnusedBikeCameraAheadPanback = FALSE;
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struct FieldCameraOffset
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{
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u8 xPixelOffset;
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u8 yPixelOffset;
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u8 xTileOffset;
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u8 yTileOffset;
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bool8 copyBGToVRAM;
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};
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static void RedrawMapSliceNorth(struct FieldCameraOffset *, const struct MapLayout *);
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static void RedrawMapSliceSouth(struct FieldCameraOffset *, const struct MapLayout *);
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static void RedrawMapSliceEast(struct FieldCameraOffset *, const struct MapLayout *);
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static void RedrawMapSliceWest(struct FieldCameraOffset *, const struct MapLayout *);
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static s32 MapPosToBgTilemapOffset(struct FieldCameraOffset *, s32, s32);
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static void DrawWholeMapViewInternal(int, int, const struct MapLayout *);
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static void DrawMetatileAt(const struct MapLayout *, u16, int, int);
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static void DrawMetatile(s32, const u16 *, u16);
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static void CameraPanningCB_PanAhead(void);
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static struct FieldCameraOffset sFieldCameraOffset;
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static s16 sHorizontalCameraPan;
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static s16 sVerticalCameraPan;
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static bool8 sBikeCameraPanFlag;
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static void (*sFieldCameraPanningCallback)(void);
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struct CameraObject gFieldCamera;
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u16 gTotalCameraPixelOffsetY;
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u16 gTotalCameraPixelOffsetX;
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static void ResetCameraOffset(struct FieldCameraOffset *cameraOffset)
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{
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cameraOffset->xTileOffset = 0;
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cameraOffset->yTileOffset = 0;
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cameraOffset->xPixelOffset = 0;
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cameraOffset->yPixelOffset = 0;
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cameraOffset->copyBGToVRAM = TRUE;
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}
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static void AddCameraTileOffset(struct FieldCameraOffset *cameraOffset, u32 xOffset, u32 yOffset)
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{
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cameraOffset->xTileOffset += xOffset;
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cameraOffset->xTileOffset %= 32;
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cameraOffset->yTileOffset += yOffset;
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cameraOffset->yTileOffset %= 32;
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}
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static void AddCameraPixelOffset(struct FieldCameraOffset *cameraOffset, u32 xOffset, u32 yOffset)
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{
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cameraOffset->xPixelOffset += xOffset;
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cameraOffset->yPixelOffset += yOffset;
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}
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void ResetFieldCamera(void)
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{
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ResetCameraOffset(&sFieldCameraOffset);
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}
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void FieldUpdateBgTilemapScroll(void)
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{
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u32 r4, r5;
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r5 = sFieldCameraOffset.xPixelOffset + sHorizontalCameraPan;
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r4 = sVerticalCameraPan + sFieldCameraOffset.yPixelOffset + 8;
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SetGpuReg(REG_OFFSET_BG1HOFS, r5);
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SetGpuReg(REG_OFFSET_BG1VOFS, r4);
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SetGpuReg(REG_OFFSET_BG2HOFS, r5);
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SetGpuReg(REG_OFFSET_BG2VOFS, r4);
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SetGpuReg(REG_OFFSET_BG3HOFS, r5);
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SetGpuReg(REG_OFFSET_BG3VOFS, r4);
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}
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void GetCameraOffsetWithPan(s16 *x, s16 *y)
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{
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*x = sFieldCameraOffset.xPixelOffset + sHorizontalCameraPan;
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*y = sFieldCameraOffset.yPixelOffset + sVerticalCameraPan + 8;
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}
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void DrawWholeMapView(void)
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{
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DrawWholeMapViewInternal(gSaveBlock1Ptr->pos.x, gSaveBlock1Ptr->pos.y, gMapHeader.mapLayout);
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sFieldCameraOffset.copyBGToVRAM = TRUE;
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}
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static void DrawWholeMapViewInternal(int x, int y, const struct MapLayout *mapLayout)
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{
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u8 i;
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u8 j;
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u32 r6;
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u8 temp;
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for (i = 0; i < 32; i += 2)
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{
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temp = sFieldCameraOffset.yTileOffset + i;
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if (temp >= 32)
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temp -= 32;
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r6 = temp * 32;
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for (j = 0; j < 32; j += 2)
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{
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temp = sFieldCameraOffset.xTileOffset + j;
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if (temp >= 32)
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temp -= 32;
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DrawMetatileAt(mapLayout, r6 + temp, x + j / 2, y + i / 2);
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}
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}
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}
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static void RedrawMapSlicesForCameraUpdate(struct FieldCameraOffset *cameraOffset, int x, int y)
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{
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const struct MapLayout *mapLayout = gMapHeader.mapLayout;
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if (x > 0)
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RedrawMapSliceWest(cameraOffset, mapLayout);
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if (x < 0)
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RedrawMapSliceEast(cameraOffset, mapLayout);
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if (y > 0)
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RedrawMapSliceNorth(cameraOffset, mapLayout);
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if (y < 0)
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RedrawMapSliceSouth(cameraOffset, mapLayout);
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cameraOffset->copyBGToVRAM = TRUE;
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}
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static void RedrawMapSliceNorth(struct FieldCameraOffset *cameraOffset, const struct MapLayout *mapLayout)
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{
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u8 i;
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u8 temp;
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u32 r7;
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temp = cameraOffset->yTileOffset + 28;
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if (temp >= 32)
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temp -= 32;
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r7 = temp * 32;
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for (i = 0; i < 32; i += 2)
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{
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temp = cameraOffset->xTileOffset + i;
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if (temp >= 32)
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temp -= 32;
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DrawMetatileAt(mapLayout, r7 + temp, gSaveBlock1Ptr->pos.x + i / 2, gSaveBlock1Ptr->pos.y + 14);
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}
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}
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static void RedrawMapSliceSouth(struct FieldCameraOffset *cameraOffset, const struct MapLayout *mapLayout)
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{
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u8 i;
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u8 temp;
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u32 r7 = cameraOffset->yTileOffset * 32;
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for (i = 0; i < 32; i += 2)
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{
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temp = cameraOffset->xTileOffset + i;
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if (temp >= 32)
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temp -= 32;
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DrawMetatileAt(mapLayout, r7 + temp, gSaveBlock1Ptr->pos.x + i / 2, gSaveBlock1Ptr->pos.y);
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}
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}
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static void RedrawMapSliceEast(struct FieldCameraOffset *cameraOffset, const struct MapLayout *mapLayout)
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{
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u8 i;
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u8 temp;
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u32 r6 = cameraOffset->xTileOffset;
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for (i = 0; i < 32; i += 2)
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{
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temp = cameraOffset->yTileOffset + i;
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if (temp >= 32)
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temp -= 32;
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DrawMetatileAt(mapLayout, temp * 32 + r6, gSaveBlock1Ptr->pos.x, gSaveBlock1Ptr->pos.y + i / 2);
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}
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}
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static void RedrawMapSliceWest(struct FieldCameraOffset *cameraOffset, const struct MapLayout *mapLayout)
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{
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u8 i;
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u8 temp;
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u8 r5 = cameraOffset->xTileOffset + 28;
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if (r5 >= 32)
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r5 -= 32;
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for (i = 0; i < 32; i += 2)
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{
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temp = cameraOffset->yTileOffset + i;
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if (temp >= 32)
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temp -= 32;
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DrawMetatileAt(mapLayout, temp * 32 + r5, gSaveBlock1Ptr->pos.x + 14, gSaveBlock1Ptr->pos.y + i / 2);
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}
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}
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void CurrentMapDrawMetatileAt(int x, int y)
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{
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int offset = MapPosToBgTilemapOffset(&sFieldCameraOffset, x, y);
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if (offset >= 0)
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{
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DrawMetatileAt(gMapHeader.mapLayout, offset, x, y);
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sFieldCameraOffset.copyBGToVRAM = TRUE;
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}
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}
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void DrawDoorMetatileAt(int x, int y, u16 *tiles)
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{
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int offset = MapPosToBgTilemapOffset(&sFieldCameraOffset, x, y);
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if (offset >= 0)
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{
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DrawMetatile(METATILE_LAYER_TYPE_COVERED, tiles, offset);
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sFieldCameraOffset.copyBGToVRAM = TRUE;
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}
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}
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static void DrawMetatileAt(const struct MapLayout *mapLayout, u16 offset, int x, int y)
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{
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u16 metatileId = MapGridGetMetatileIdAt(x, y);
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const u16 *metatiles;
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if (metatileId > NUM_METATILES_TOTAL)
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metatileId = 0;
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if (metatileId < NUM_METATILES_IN_PRIMARY)
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metatiles = mapLayout->primaryTileset->metatiles;
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else
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{
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metatiles = mapLayout->secondaryTileset->metatiles;
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metatileId -= NUM_METATILES_IN_PRIMARY;
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}
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DrawMetatile(MapGridGetMetatileLayerTypeAt(x, y), metatiles + metatileId * NUM_TILES_PER_METATILE, offset);
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}
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static void DrawMetatile(s32 metatileLayerType, const u16 *tiles, u16 offset)
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{
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switch (metatileLayerType)
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{
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case METATILE_LAYER_TYPE_SPLIT:
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// Draw metatile's bottom layer to the bottom background layer.
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gOverworldTilemapBuffer_Bg3[offset] = tiles[0];
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gOverworldTilemapBuffer_Bg3[offset + 1] = tiles[1];
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gOverworldTilemapBuffer_Bg3[offset + 0x20] = tiles[2];
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gOverworldTilemapBuffer_Bg3[offset + 0x21] = tiles[3];
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// Draw transparent tiles to the middle background layer.
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gOverworldTilemapBuffer_Bg2[offset] = 0;
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gOverworldTilemapBuffer_Bg2[offset + 1] = 0;
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gOverworldTilemapBuffer_Bg2[offset + 0x20] = 0;
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gOverworldTilemapBuffer_Bg2[offset + 0x21] = 0;
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// Draw metatile's top layer to the top background layer.
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gOverworldTilemapBuffer_Bg1[offset] = tiles[4];
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gOverworldTilemapBuffer_Bg1[offset + 1] = tiles[5];
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gOverworldTilemapBuffer_Bg1[offset + 0x20] = tiles[6];
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gOverworldTilemapBuffer_Bg1[offset + 0x21] = tiles[7];
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break;
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case METATILE_LAYER_TYPE_COVERED:
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// Draw metatile's bottom layer to the bottom background layer.
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gOverworldTilemapBuffer_Bg3[offset] = tiles[0];
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gOverworldTilemapBuffer_Bg3[offset + 1] = tiles[1];
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gOverworldTilemapBuffer_Bg3[offset + 0x20] = tiles[2];
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gOverworldTilemapBuffer_Bg3[offset + 0x21] = tiles[3];
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// Draw metatile's top layer to the middle background layer.
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gOverworldTilemapBuffer_Bg2[offset] = tiles[4];
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gOverworldTilemapBuffer_Bg2[offset + 1] = tiles[5];
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gOverworldTilemapBuffer_Bg2[offset + 0x20] = tiles[6];
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gOverworldTilemapBuffer_Bg2[offset + 0x21] = tiles[7];
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// Draw transparent tiles to the top background layer.
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gOverworldTilemapBuffer_Bg1[offset] = 0;
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gOverworldTilemapBuffer_Bg1[offset + 1] = 0;
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gOverworldTilemapBuffer_Bg1[offset + 0x20] = 0;
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gOverworldTilemapBuffer_Bg1[offset + 0x21] = 0;
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break;
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case METATILE_LAYER_TYPE_NORMAL:
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// Draw garbage to the bottom background layer.
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gOverworldTilemapBuffer_Bg3[offset] = 0x3014;
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gOverworldTilemapBuffer_Bg3[offset + 1] = 0x3014;
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gOverworldTilemapBuffer_Bg3[offset + 0x20] = 0x3014;
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gOverworldTilemapBuffer_Bg3[offset + 0x21] = 0x3014;
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// Draw metatile's bottom layer to the middle background layer.
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gOverworldTilemapBuffer_Bg2[offset] = tiles[0];
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gOverworldTilemapBuffer_Bg2[offset + 1] = tiles[1];
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gOverworldTilemapBuffer_Bg2[offset + 0x20] = tiles[2];
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gOverworldTilemapBuffer_Bg2[offset + 0x21] = tiles[3];
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// Draw metatile's top layer to the top background layer, which covers object event sprites.
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gOverworldTilemapBuffer_Bg1[offset] = tiles[4];
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gOverworldTilemapBuffer_Bg1[offset + 1] = tiles[5];
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gOverworldTilemapBuffer_Bg1[offset + 0x20] = tiles[6];
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gOverworldTilemapBuffer_Bg1[offset + 0x21] = tiles[7];
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break;
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}
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ScheduleBgCopyTilemapToVram(1);
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ScheduleBgCopyTilemapToVram(2);
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ScheduleBgCopyTilemapToVram(3);
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}
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static s32 MapPosToBgTilemapOffset(struct FieldCameraOffset *cameraOffset, s32 x, s32 y)
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{
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x -= gSaveBlock1Ptr->pos.x;
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x *= 2;
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if (x >= 32 || x < 0)
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return -1;
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x = x + cameraOffset->xTileOffset;
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if (x >= 32)
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x -= 32;
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y = (y - gSaveBlock1Ptr->pos.y) * 2;
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if (y >= 32 || y < 0)
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return -1;
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y = y + cameraOffset->yTileOffset;
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if (y >= 32)
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y -= 32;
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return y * 32 + x;
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}
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static void CameraUpdateCallback(struct CameraObject *fieldCamera)
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{
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if (fieldCamera->spriteId != 0)
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{
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fieldCamera->movementSpeedX = gSprites[fieldCamera->spriteId].data[2];
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fieldCamera->movementSpeedY = gSprites[fieldCamera->spriteId].data[3];
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}
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}
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void ResetCameraUpdateInfo(void)
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{
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gFieldCamera.movementSpeedX = 0;
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gFieldCamera.movementSpeedY = 0;
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gFieldCamera.x = 0;
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gFieldCamera.y = 0;
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gFieldCamera.spriteId = 0;
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gFieldCamera.callback = NULL;
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}
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u32 InitCameraUpdateCallback(u8 trackedSpriteId)
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{
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if (gFieldCamera.spriteId != 0)
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DestroySprite(&gSprites[gFieldCamera.spriteId]);
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gFieldCamera.spriteId = AddCameraObject(trackedSpriteId);
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gFieldCamera.callback = CameraUpdateCallback;
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return 0;
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}
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void CameraUpdate(void)
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{
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int deltaX;
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int deltaY;
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int curMovementOffsetY;
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int curMovementOffsetX;
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int movementSpeedX;
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int movementSpeedY;
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if (gFieldCamera.callback != NULL)
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gFieldCamera.callback(&gFieldCamera);
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movementSpeedX = gFieldCamera.movementSpeedX;
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movementSpeedY = gFieldCamera.movementSpeedY;
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deltaX = 0;
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deltaY = 0;
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curMovementOffsetX = gFieldCamera.x;
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curMovementOffsetY = gFieldCamera.y;
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if (curMovementOffsetX == 0 && movementSpeedX != 0)
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{
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if (movementSpeedX > 0)
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deltaX = 1;
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else
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deltaX = -1;
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}
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if (curMovementOffsetY == 0 && movementSpeedY != 0)
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{
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if (movementSpeedY > 0)
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deltaY = 1;
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else
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deltaY = -1;
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}
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if (curMovementOffsetX != 0 && curMovementOffsetX == -movementSpeedX)
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{
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if (movementSpeedX > 0)
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deltaX = 1;
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else
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deltaX = -1;
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}
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if (curMovementOffsetY != 0 && curMovementOffsetY == -movementSpeedY)
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{
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if (movementSpeedY > 0)
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deltaX = 1;
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else
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deltaX = -1;
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}
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gFieldCamera.x += movementSpeedX;
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gFieldCamera.x %= 16;
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gFieldCamera.y += movementSpeedY;
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gFieldCamera.y %= 16;
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if (deltaX != 0 || deltaY != 0)
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{
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CameraMove(deltaX, deltaY);
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UpdateObjectEventsForCameraUpdate(deltaX, deltaY);
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RotatingGatePuzzleCameraUpdate(deltaX, deltaY);
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SetBerryTreesSeen();
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AddCameraTileOffset(&sFieldCameraOffset, deltaX * 2, deltaY * 2);
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RedrawMapSlicesForCameraUpdate(&sFieldCameraOffset, deltaX * 2, deltaY * 2);
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}
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AddCameraPixelOffset(&sFieldCameraOffset, movementSpeedX, movementSpeedY);
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gTotalCameraPixelOffsetX -= movementSpeedX;
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gTotalCameraPixelOffsetY -= movementSpeedY;
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}
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void MoveCameraAndRedrawMap(int deltaX, int deltaY) //unused
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{
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CameraMove(deltaX, deltaY);
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UpdateObjectEventsForCameraUpdate(deltaX, deltaY);
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DrawWholeMapView();
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gTotalCameraPixelOffsetX -= deltaX * 16;
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gTotalCameraPixelOffsetY -= deltaY * 16;
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}
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void SetCameraPanningCallback(void (*callback)(void))
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{
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sFieldCameraPanningCallback = callback;
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}
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void SetCameraPanning(s16 horizontal, s16 vertical)
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{
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sHorizontalCameraPan = horizontal;
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sVerticalCameraPan = vertical + 32;
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}
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void InstallCameraPanAheadCallback(void)
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{
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sFieldCameraPanningCallback = CameraPanningCB_PanAhead;
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sBikeCameraPanFlag = FALSE;
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sHorizontalCameraPan = 0;
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sVerticalCameraPan = 32;
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}
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void UpdateCameraPanning(void)
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{
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if (sFieldCameraPanningCallback != NULL)
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sFieldCameraPanningCallback();
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//Update sprite offset of overworld objects
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gSpriteCoordOffsetX = gTotalCameraPixelOffsetX - sHorizontalCameraPan;
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gSpriteCoordOffsetY = gTotalCameraPixelOffsetY - sVerticalCameraPan - 8;
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}
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static void CameraPanningCB_PanAhead(void)
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{
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u8 var;
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if (gUnusedBikeCameraAheadPanback == FALSE)
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{
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InstallCameraPanAheadCallback();
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}
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else
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{
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// this code is never reached
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if (gPlayerAvatar.tileTransitionState == T_TILE_TRANSITION)
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{
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sBikeCameraPanFlag ^= 1;
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if (sBikeCameraPanFlag == FALSE)
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return;
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}
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else
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{
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sBikeCameraPanFlag = FALSE;
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}
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var = GetPlayerMovementDirection();
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if (var == 2)
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{
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if (sVerticalCameraPan > -8)
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sVerticalCameraPan -= 2;
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}
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else if (var == 1)
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{
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if (sVerticalCameraPan < 72)
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sVerticalCameraPan += 2;
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}
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else if (sVerticalCameraPan < 32)
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{
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sVerticalCameraPan += 2;
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}
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else if (sVerticalCameraPan > 32)
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{
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sVerticalCameraPan -= 2;
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}
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}
|
|
}
|