include/twn_context.h

@@ -16,10 +16,10 @@ typedef struct Context {
     void *udata;
 
     /* which frame is it, starting from 0 at startup */
-    float frame_number;
+    uint64_t frame_number;
 
     /* real time spent on one frame (in seconds) */
-    /* townengine is fixed step based, so you don't have to use delta */
+    /* townengine is fixed step based, so you don't have */
     /* TODO: actually set it */
     float frame_duration;
 
@@ -30,7 +30,7 @@ typedef struct Context {
     Vec2 mouse_movement;
 
     /* is set on startup, should be used as source of randomness */
-    float random_seed;
+    uint64_t random_seed;
 
     /* whether debugging logic should be enabled in user code */
     bool debug;

include/twn_types.h

@@ -22,6 +22,16 @@ typedef struct Vec3 {
 } Vec3;
 
 
+/* a point in some three dimension space (floating point) */
+/* y goes up, x goes to the right */
+typedef struct Vec4 {
+    float x;
+    float y;
+    float z;
+    float w;
+} Vec4;
+
+
 /* 32-bit color data */
 typedef struct Color {
     uint8_t r;
@@ -39,5 +49,10 @@ typedef struct Rect {
     float h;
 } Rect;
 
+/* TODO: remove from here? */
+typedef struct Matrix4 {
+    Vec4 row[4];
+} Matrix4;
+
 
 #endif

share/twn_api.json

@@ -239,6 +239,16 @@
             "c_type": "Vec3"
         },
 
+        "Vec4": {
+            "fields": [
+                { "name": "x", "type": "float" },
+                { "name": "y", "type": "float" },
+                { "name": "z", "type": "float" },
+                { "name": "w", "type": "float" }
+            ],
+            "c_type": "Vec4"
+        },
+
         "Color": {
             "fields": [
                 { "name": "r", "type": "uint8_t" },

src/game_object/twn_linux_game_object.c

@@ -19,7 +19,7 @@ static void (*game_end_callback)(void);
 static x_watcher *watcher;
 static void *handle = NULL;
 
-static float last_tick_modified;
+static uint64_t last_tick_modified;
 static bool loaded_after_modification = true;
 static SDL_mutex *lock;
 
@@ -59,7 +59,7 @@ static void load_game_object(void) {
 
     handle = new_handle;
 
-    if (fabsf(0.0f - ctx.game.frame_number) > 0.00001f)
+    if (ctx.game.frame_number != 0)
         log_info("Game object was reloaded\n");
 
     return;

src/rendering/twn_draw_c.h

@@ -4,7 +4,6 @@
 /* TODO: structure more categorically */
 
 #include "twn_textures_c.h"
-#include "twn_types_c.h"
 #include "twn_text_c.h"
 #include "twn_option.h"
 #include "twn_deferred_commands.h"

src/rendering/twn_gl_15_rendering.c

@@ -20,7 +20,7 @@ void start_render_frame(void) {
 
 
 void end_render_frame(void) {
-    if (!ctx.render_double_buffered || (fabsf(1.0f - ctx.game.frame_number) < 0.00001f)) {
+    if (!ctx.render_double_buffered || ctx.game.frame_number == 1) {
         issue_deferred_draw_commands();
         SDL_GL_SwapWindow(ctx.window);
         arrsetlen(deferred_commands, 0);

src/twn_camera_c.h

@@ -2,7 +2,6 @@
 #define TWN_CAMERA_H
 
 #include "twn_types.h"
-#include "twn_types_c.h"
 
 /* TODO: make it cached? */
 /*       for example, perspective matrix only needs recaluclation on FOV change */

src/twn_loop.c

@@ -236,7 +236,7 @@ static void main_loop(void) {
             preserve_persistent_ctx_fields();
 
             ctx.frame_accumulator -= ctx.desired_frametime;
-            ctx.game.frame_number++;
+            ctx.game.frame_number = (ctx.game.frame_number % ULLONG_MAX) + 1;
             ctx.game.initialization_needed = false;
         }
     }
@@ -584,9 +584,9 @@ static bool initialize(void) {
     /* random seeding */
     /* SDL_GetPerformanceCounter returns some platform-dependent number. */
     /* it should vary between game instances. i checked! random enough for me. */
-    ctx.game.random_seed = (float)(SDL_GetPerformanceCounter() % 16777216);
+    ctx.game.random_seed = SDL_GetPerformanceCounter();
     srand((unsigned int)ctx.game.random_seed);
-    stbds_rand_seed((size_t)ctx.game.random_seed);
+    stbds_rand_seed(ctx.game.random_seed);
 
     /* main loop machinery */
     toml_datum_t datum_ticks_per_second = toml_int_in(engine, "ticks_per_second");

src/twn_types_c.h

@@ -1,19 +0,0 @@
-#ifndef TWN_TYPES_C_H
-#define TWN_TYPES_C_H
-
-#include <stdint.h>
-
-typedef struct Vec4 {
-    float x;
-    float y;
-    float z;
-    float w;
-} Vec4;
-
-
-typedef struct Matrix4 {
-    Vec4 row[4];
-} Matrix4;
-
-
-#endif