Fix Crab Impl

src/engine/courses/KoopaTroopaBeach.cpp

@@ -7,6 +7,7 @@
 #include "World.h"
 #include "engine/actors/AFinishline.h"
 #include "engine/objects/BombKart.h"
+#include "engine/objects/Crab.h"
 #include "assets/koopa_troopa_beach_data.h"
 
 extern "C" {
@@ -144,6 +145,19 @@ void KoopaTroopaBeach::SpawnActors() {
     init_actor_hot_air_balloon_item_box(328.0f * gCourseDirection, 70.0f, 2541.0f);
     spawn_all_item_boxes((struct ActorSpawnData*)LOAD_ASSET_RAW(d_course_koopa_troopa_beach_item_box_spawns));
     spawn_palm_trees((struct ActorSpawnData*)LOAD_ASSET_RAW(d_course_koopa_troopa_beach_tree_spawn));
+
+    if (gGamestate != CREDITS_SEQUENCE) {
+        gWorldInstance.AddObject(new OCrab(FVector2D(-1809, 625), FVector2D(-1666, 594)));
+        gWorldInstance.AddObject(new OCrab(FVector2D(-1852, 757), FVector2D(-1620, 740)));
+        gWorldInstance.AddObject(new OCrab(FVector2D(-1478, 1842), FVector2D(-1453, 1833)));
+        gWorldInstance.AddObject(new OCrab(FVector2D(-1418, 1967), FVector2D(-1455, 1962)));
+        gWorldInstance.AddObject(new OCrab(FVector2D(-1472, 2112), FVector2D(-1417, 2100)));
+        gWorldInstance.AddObject(new OCrab(FVector2D(-1389, 2152), FVector2D(-1335, 2136)));
+        gWorldInstance.AddObject(new OCrab(FVector2D(218, 693), FVector2D(69, 696)));
+        gWorldInstance.AddObject(new OCrab(FVector2D(235, 528), FVector2D(24, 501)));
+        gWorldInstance.AddObject(new OCrab(FVector2D(268, 406), FVector2D(101, 394)));
+        gWorldInstance.AddObject(new OCrab(FVector2D(223, 318), FVector2D(86, 308)));
+    }
 }
 
 void KoopaTroopaBeach::SpawnVehicles() {
@@ -173,19 +187,6 @@ void KoopaTroopaBeach::InitCourseObjects() {
     size_t objectId;
     size_t i;
 
-    if (gGamestate != CREDITS_SEQUENCE) {
-        for (i = 0; i < NUM_CRABS; i++) {
-            objectId = indexObjectList1[i];
-            init_object(objectId, 0);
-            gObjectList[objectId].pos[0] = gObjectList[objectId].origin_pos[0] =
-                gCrabSpawns[i].startX * xOrientation;
-            gObjectList[objectId].unk_01C[0] = gCrabSpawns[i].patrolX * xOrientation;
-
-            gObjectList[objectId].pos[2] = gObjectList[objectId].origin_pos[2] = gCrabSpawns[i].startZ;
-            gObjectList[objectId].unk_01C[2] = gCrabSpawns[i].patrolZ;
-        }
-    }
-
     if (gGamestate == CREDITS_SEQUENCE) {
         Vec3f pos = {-360.0f, 60.0f, -1300.0f};
         for (size_t i = 0; i < NUM_SEAGULLS; i++) {

src/engine/courses/TestCourse.cpp

@@ -21,6 +21,7 @@
 #include "engine/objects/Hedgehog.h"
 #include "engine/objects/Flagpole.h"
 #include "engine/objects/HotAirBalloon.h"
+#include "engine/objects/Crab.h"
 #include "engine/particles/StarEmitter.h"
 
 extern "C" {
@@ -211,7 +212,9 @@ void TestCourse::SpawnActors() {
 //gWorldInstance.AddEmitter(new StarEmitter(FVector(0,50,0)));
     //gWorldInstance.AddObject(new OHedgehog(FVector(0, 0, 0), FVector2D(0, -200), 9));
     //gWorldInstance.AddObject(new OFlagpole(FVector(0, 0, -200), 0x400));
-    gWorldInstance.AddObject(new OHotAirBalloon(FVector(0.0, 20.0f, -200.0f)));
+//    gWorldInstance.AddObject(new OHotAirBalloon(FVector(0.0, 20.0f, -200.0f)));
+
+    gWorldInstance.AddObject(new OCrab(FVector2D(0, 0), FVector2D(0, -200)));
 }
 
 // Likely sets minimap boundaries

src/engine/objects/Crab.cpp

@@ -23,25 +23,28 @@ extern "C" {
 #include "assets/koopa_troopa_beach_data.h"
 }
 
-OCrab::OCrab(s32 i, Vec3f pos) {
+size_t OCrab::_count = 0;
+
+OCrab::OCrab(const FVector2D& start, const FVector2D& end) {
     s32 objectId;
-        //for (i = 0; i < NUM_CRABS; i++) {
-    _idx = i;
-    objectId = indexObjectList1[i];
+    _idx = _count;
+    _start = start;
+    _end = end;
+
+    objectId = indexObjectList1[_idx];
     init_object(objectId, 0);
-    gObjectList[objectId].pos[0] = gObjectList[objectId].origin_pos[0] =
-           gCrabSpawns[i].startX * xOrientation;
+    gObjectList[objectId].pos[0] = gObjectList[objectId].origin_pos[0] = start.x * xOrientation;
+    gObjectList[objectId].pos[2] = gObjectList[objectId].origin_pos[2] = start.z;
 
-    gObjectList[objectId].unk_01C[0] = gCrabSpawns[i].patrolX * xOrientation;
+    gObjectList[objectId].unk_01C[0] = end.x * xOrientation;
+    gObjectList[objectId].unk_01C[2] = end.z;
 
-    gObjectList[objectId].pos[2] = gObjectList[objectId].origin_pos[2] = gCrabSpawns[i].startZ;
-    gObjectList[objectId].unk_01C[2] = gCrabSpawns[i].patrolZ;
+    _count++;
 }
 
 void OCrab::Tick(void) {
     s32 objectIndex;
 
-    //for (var_s1 = 0; var_s1 < NUM_CRABS; var_s1++) {
     objectIndex = indexObjectList1[_idx];
     if (gObjectList[objectIndex].state != 0) {
         OCrab::func_80082B34(objectIndex);
@@ -49,12 +52,11 @@ void OCrab::Tick(void) {
         OCrab::func_80082C30(objectIndex);
         OCrab::func_80082E18(objectIndex);
     }
-    //}
 }
 
-void OCrab::Draw(s32 objectIndex, s32 cameraId) {
+void OCrab::Draw(s32 cameraId) {
     Camera* camera;
-
+    s32 objectIndex = indexObjectList1[_idx];
     if (gObjectList[objectIndex].state >= 2) {
         Vtx* vtx = (Vtx*) LOAD_ASSET_RAW(common_vtx_hedgehog);
         camera = &camera1[cameraId];
@@ -72,7 +74,6 @@ void OCrab::DrawModel(s32 cameraId) {
     s32 someIndex;
     s32 test;
 
-    //for (someIndex = 0; someIndex < NUM_CRABS; someIndex++) {
     test = indexObjectList1[_idx];
     func_8008A364(test, cameraId, 0x2AABU, 800);
     if (is_obj_flag_status_active(test, VISIBLE) != 0) {
@@ -86,7 +87,6 @@ void OCrab::DrawModel(s32 cameraId) {
             draw_2d_texture_at(gObjectList[objectIndex].pos, gObjectList[objectIndex].orientation, gObjectList[objectIndex].sizeScaling, (u8*) gObjectList[objectIndex].activeTLUT, (u8*)gObjectList[objectIndex].activeTexture, (Vtx*)common_vtx_hedgehog, 0x00000040, 0x00000040, 0x00000040, 0x00000020);
         }
     }
-    //}
 }
 
 void OCrab::init_ktb_crab(s32 objectIndex) {

src/engine/objects/Crab.h

@@ -2,6 +2,8 @@
 
 #include <libultraship.h>
 #include <vector>
+#include "engine/objects/Object.h"
+#include "World.h"
 
 extern "C" {
 #include "macros.h"
@@ -14,20 +16,23 @@ extern "C" {
 #include "some_data.h"
 }
 
-
-class OCrab {
+/**
+ * @arg start x and z spawn location
+ * @arg end x and z patrol location
+ * 
+ * Crab patrols between start and end.
+ * The game automatically places the actor on the course surface.
+ * Therefore, providing a Y height is unnecessary.
+ * 
+ * Crab appears to have a maximum patrolling distance and will patrol between
+ * end --> max distance rather than start --> end or start --> max distance.
+ */
+class OCrab : public OObject {
 public:
-    enum Behaviour : uint16_t {
-    };
+    explicit OCrab(const FVector2D& start, const FVector2D& end);
 
-public:
-    f32 Diameter = 0.0f; // Waddle in a circle around the spawn point at this diameter.
-    uint16_t MirrorModeAngleOffset;
-
-    explicit OCrab(s32 i, Vec3f pos);
-
-    void Tick();
-    void Draw(s32 objectIndex, s32 cameraId);
+    virtual void Tick() override;
+    virtual void Draw(s32 cameraId) override;
     void DrawModel(s32 cameraId);
 
     void init_ktb_crab(s32 objectIndex);
@@ -36,6 +41,8 @@ public:
     void func_80082E18(s32 objectIndex);
 
 private:
-
+    FVector2D _start;
+    FVector2D _end;
+    static size_t _count;
     s32 _idx;
 };