Added random number generator

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

@@ -63,13 +63,6 @@ int main(int argc, char **argv) {
 		game->draw.camera = camera;
 	}
 
-	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,
@@ -108,7 +101,8 @@ int main(int argc, char **argv) {
 			}
       ProcessEvents(&e, &world);
 		}
-    UpdateWorld(1.0/60.0, &world);
+
+    UpdateWorld(1.0f / 60.0f, &world);
 
 		int w, h;
 		SDL_GetWindowSizeInPixels(window, &w, &h);
@@ -116,7 +110,7 @@ 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

@@ -23,7 +23,7 @@ struct G_State {
 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"

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);
   }
 }