feat: Random npc walkabouts

Fixed typo in calculate camera
Removed some warning

code/core/impl/math.c

@@ -160,4 +160,46 @@ Mat4x4FInv M4x4F_CameraView(V3f x, V3f y, V3f z, V3f p) {
 	return result;
 }
 
+// Random
 
+Random Random_Seed(U64 seed) {
+	Random result = { seed };
+	return result;
+}
+
+U64 Random_Next(Random *rnd) {
+	U64 result = rnd->state;
+
+	result ^= (result << 13);
+	result ^= (result >>  7);
+	result ^= (result << 17);
+
+	rnd->state = result;
+
+	return result;
+}
+
+F32 Random_F32(Random *rnd, F32 min, F32 max) {
+	F32 result = min + (Random_Unilateral(rnd) * (max - min));
+	return result;
+}
+
+F64 Random_F64(Random *rnd, F64 min, F64 max) {
+	F64 result = min + (Random_Unilateral(rnd) * (max - min));
+	return result;
+}
+
+U32 Random_U32(Random *rnd, U32 min, U32 max) {
+	U32 result = min + (U32) (Random_Unilateral(rnd) * (max - min));
+	return result;
+}
+
+F32 Random_Unilateral(Random *rnd) {
+	F32 result = Random_Next(rnd) / (F32) U64_MAX;
+	return result;
+}
+
+F32 Random_Bilateral(Random *rnd) {
+	F32 result = -1.0f + (2.0f * Random_Unilateral(rnd));
+	return result;
+}

code/core/math.h

@@ -4,6 +4,11 @@
 #define PI_F32  (3.14159265358979323846264338f)
 #define TAU_F32 (2.0f * PI_F32)
 
+typedef struct Random Random;
+struct Random {
+	U64 state;
+};
+
 typedef union V2f V2f;
 union V2f {
 	struct {
@@ -114,4 +119,18 @@ function V3f M4x4F_VMul3(Mat4x4F m, V3f v);
 function Mat4x4FInv M4x4F_Perspective(F32 fov, F32 aspect, F32 nearp, F32 farp);
 function Mat4x4FInv M4x4F_CameraView(V3f x, V3f y, V3f z, V3f p);
 
+// Random
+
+function Random Random_Seed(U64 seed);
+
+function U64 Random_Next(Random *rnd);
+
+function F32 Random_F32(Random *rnd, F32 min, F32 max);
+function F64 Random_F64(Random *rnd, F64 min, F64 max);
+
+function U32 Random_U32(Random *rnd, U32 min, U32 max);
+
+function F32 Random_Unilateral(Random *rnd);
+function F32 Random_Bilateral(Random *rnd);
+
 #endif  // LD_CORE_MATH_H_

code/draw/core.h

@@ -1,7 +1,7 @@
 #if !defined(LD_DRAW_CORE_H_)
 #define LD_DRAW_CORE_H_
 
-#define D_MAX_RECTS 1024
+#define D_MAX_RECTS (262144)
 
 typedef struct D_Image D_Image;
 struct D_Image {

code/first.c

@@ -61,39 +61,43 @@ int main(int argc, char **argv) {
 		camera->farp  = 1000.0f;
 
 		game->draw.camera = camera;
+		World *world = M_ArenaPush(arena, World);
+    game->world = world;
+    world->random = Random_Seed(29237489723847);
+    world->npcCount = 2;
+    NPC *npc1 = &world->npcs[0];
+    npc1->collision.pos.x = 15;
+    npc1->collision.pos.y = 15;
+    npc1->collision.size.x = 10;
+    npc1->collision.size.y = 10;
+    npc1->name = S("Matt");
+    npc1->mode = NPC_ACTION_WAITING;
+    npc1->waitTime = 0;
+    npc1->maxWaitTime = 5;
+    npc1->currentNavNode = 87;
+    npc1->collision.pos.x = 15;
+    npc1->collision.pos.y = 15;
+    npc1->collision.size.x = 10;
+    npc1->collision.size.y = 10;
+
+    NPC *npc2 = &world->npcs[1];
+    npc2->collision.pos.x = 15;
+    npc2->collision.pos.y = 15;
+    npc2->collision.size.x = 10;
+    npc2->collision.size.y = 10;
+    npc2->name = S("James");
+    npc2->mode = NPC_ACTION_WAITING;
+    npc2->waitTime = 0;
+    npc2->maxWaitTime = 10;
+    npc2->currentNavNode = 0;
+
+    world->navMesh = &TestNavMesh;
+    world->npcPOI[0] = 100;
+    world->player.pos.x = 0;
+    world->player.pos.y = 0;
 	}
 
-	Vk_Buffer rbo = { 0 };
-	rbo.usage        = VK_BUFFER_USAGE_STORAGE_BUFFER_BIT;
-	rbo.size         = KB(4);
-	rbo.host_visible = true;
-
-	Vk_BufferCreate(&rbo);
-
 	bool running = true;
-  World world = {
-    .npcCount = 2,
-    .npcs = {
-      {
-        .collision = {{10, 10}, {10, 10}},
-        .name = S("Matt"),
-        .mode = NPC_ACTION_WAITING,
-        .waitTime = 0,
-        .maxWaitTime = 5,
-        .currentNavNode = 87
-      },{
-        .collision = {{15, 15}, {10, 10}},
-        .name = S("James"),
-        .mode = NPC_ACTION_WAITING,
-        .waitTime = 0,
-        .maxWaitTime = 10,
-        .currentNavNode = 0
-      }
-    },
-    .navMesh = &TestNavMesh,
-    .npcPOI = {100},
-    .player = {.pos = {0,0}}
-  };
 
 	printf("%zu size in bytes\n", sizeof(TestNavMesh));
 
@@ -106,9 +110,9 @@ int main(int argc, char **argv) {
 			{
 				running = false;
 			}
-      ProcessEvents(&e, &world);
+      ProcessEvents(&e, game->world);
 		}
-    UpdateWorld(1.0/60.0, &world);
+    UpdateWorld(1.0/60.0, game->world);
 
 		int w, h;
 		SDL_GetWindowSizeInPixels(window, &w, &h);
@@ -116,7 +120,7 @@ int main(int argc, char **argv) {
 		game->draw.window_width  = w;
 		game->draw.window_height = h;
 
-		G_CalulateCamera(&game->camera, (F32) w / (F32) h);
+		G_CalculateCamera(&game->camera, (F32) w / (F32) h);
 
 		Vk_Frame *frame = Vk_FrameBegin(window);
 		VkCommandBuffer cmd = frame->cmd;

code/game/core.c

@@ -290,7 +290,7 @@ void G_PipelinesLoad(G_State *game) {
 	Vk_PipelineCreate(basic);
 }
 
-void G_CalulateCamera(G_Camera *camera, F32 aspect) {
+void G_CalculateCamera(G_Camera *camera, F32 aspect) {
 	Mat4x4FInv proj = M4x4F_Perspective(camera->fov, aspect, camera->nearp, camera->farp);
 	Mat4x4FInv view = M4x4F_CameraView(camera->x, camera->y, camera->z, camera->p);
 

code/game/core.h

@@ -1,5 +1,6 @@
 #if !defined(LD_GAME_CORE_H_)
 #define LD_GAME_CORE_H_
+#include "world.h"
 
 typedef struct G_Camera G_Camera;
 struct G_Camera {
@@ -18,17 +19,18 @@ struct G_State {
 
 	D_Context draw;
 	G_Camera camera;
+
+  World *world;
 };
 
 function void G_ImagesLoad(G_State *game);
 function void G_PipelinesLoad(G_State *game);
 
-function void G_CalulateCamera(G_Camera *camera, F32 aspect);
+function void G_CalculateCamera(G_Camera *camera, F32 aspect);
 
 #include "aabb.h"
 #include "player.h"
 #include "nav.h"
 #include "npc.h"
-#include "world.h"
 
 #endif  // LD_GAME_CORE_H_

code/game/impl/npc.c

@@ -1,6 +1,7 @@
 #include "game/npc.h"
 #include "game/world.h"
 #include "core/types.h"
+#include "core/math.h"
 
 #include <stdio.h>
 
@@ -10,8 +11,8 @@ void updateNPC(F32 delta, NPC *npc, World *world) {
       npc->waitTime+=delta;
       if(npc->waitTime > npc->maxWaitTime) {
         npc->mode = NPC_ACTION_WALKING;
-        U32 next = npc->targetNavNode == 100 ? 20 : 100;
-        npc->targetNavNode = next; // TODO RANDOM
+        // TODO change targets to poi's rather than just random nodes
+        npc->targetNavNode = Random_U32(&world->random, 0, world->navMesh->nodeCount);
         printf("Starting to nav path\n");
         npc->path = Nav_Path(world->navMesh, npc->currentNavNode, npc->targetNavNode);
         printf("done\n");
@@ -26,7 +27,7 @@ void updateNPC(F32 delta, NPC *npc, World *world) {
         if(npc->path.nodeCount == npc->pathIndex+1){
           printf("Finished! so I'm waiting\n");
           npc->mode = NPC_ACTION_WAITING;
-          npc->maxWaitTime = 20; // TODO RANDOM
+          npc->maxWaitTime = Random_F32(&world->random, 10, 40);
           npc->waitTime = 0;
           npc->pathIndex = 0;
           return;

code/game/impl/world.c

@@ -8,7 +8,7 @@ void UpdateWorld(F32 delta, World *world) {
 }
 
 void UpdateNPCs(F32 delta, World *world) {
-  for(int i = 0; i < world->npcCount; i++) {
+  for(U32 i = 0; i < world->npcCount; i++) {
     updateNPC(delta, &world->npcs[i], world);
   }
 }

code/game/world.h

@@ -4,6 +4,7 @@
 #include "player.h"
 #include "npc.h"
 #include "bandit.h"
+#include "../core/math.h"
 
 // Areas are which
 typedef U32 World_Area;
@@ -16,6 +17,7 @@ typedef struct World World;
 struct World {
   //// Static stuff
   NavMesh *navMesh;
+  Random random;
 
   //// Player
 	Player player;