debug drawing api + physics tweaks

code/game/CMakeLists.txt

@@ -21,6 +21,7 @@ add_executable(eco2d
     src/signal_handling.c
     src/profiler.c
     src/debug_ui.c
+    src/debug_draw.c
 
     src/utils/options.c
 

code/game/src/debug_draw.c

@@ -0,0 +1,61 @@
+#include "debug_draw.h"
+
+static debug_draw_queue draw_queue = {0};
+
+#ifdef ECO2D_PROD
+static bool draw_is_enabled = false;
+#else
+static bool draw_is_enabled = true;
+#endif
+
+debug_draw_queue *debug_draw_samples(void) {
+    return &draw_queue;
+}
+
+void debug_draw_flush(void) {
+    draw_queue.num_entries = 0;
+}
+
+void debug_draw_enable(bool state) {
+    draw_is_enabled = state;
+}
+
+bool debug_draw_state(void) {
+    return draw_is_enabled;
+}
+
+inline void debug_push_entry(debug_draw_entry entry) {
+    if (!draw_is_enabled) return;
+    ZPL_ASSERT(draw_queue.num_entries < DEBUG_DRAW_MAX_ENTRIES);
+    draw_queue.entries[draw_queue.num_entries++] = entry;
+}
+
+void debug_push_line(debug_v2 a, debug_v2 b, int32_t color) {
+    debug_push_entry((debug_draw_entry){
+                         .kind = DDRAW_LINE,
+                         .color = color,
+                         
+                         .a = a,
+                         .b = b,
+                     });
+}
+
+void debug_push_circle(debug_v2 pos, float radius, int32_t color) {
+    debug_push_entry((debug_draw_entry){
+                         .kind = DDRAW_CIRCLE,
+                         .color = color,
+                         
+                         .pos = pos,
+                         .radius = radius,
+                     });
+}
+
+void debug_push_rect(debug_v2 bmin, debug_v2 bmax, int32_t color) {
+    debug_push_entry((debug_draw_entry){
+                         .kind = DDRAW_RECT,
+                         .color = color,
+                         
+                         .bmin = bmin,
+                         .bmax = bmax,
+                     });
+}

code/game/src/debug_draw.h

@@ -0,0 +1,53 @@
+#pragma once 
+#include "system.h"
+
+// NOTE(zaklaus): Debug drawing queue
+
+typedef enum {
+    DDRAW_LINE,
+    DDRAW_CIRCLE,
+    DDRAW_RECT,
+} debug_draw_kind;
+
+typedef struct {
+    float x,y;
+} debug_v2;
+
+typedef struct {
+    debug_draw_kind kind;
+    int32_t color;
+    
+    union {
+        struct {
+            debug_v2 a, b;
+        };
+        
+        struct {
+            debug_v2 bmin, bmax;
+        };
+        
+        struct {
+            debug_v2 pos;
+            float radius;
+        };
+    };
+} debug_draw_entry;
+
+#ifndef DEBUG_DRAW_MAX_ENTRIES
+#define DEBUG_DRAW_MAX_ENTRIES 65535
+#endif
+
+typedef struct {
+    size_t num_entries;
+    debug_draw_entry entries[DEBUG_DRAW_MAX_ENTRIES];
+} debug_draw_queue;
+
+debug_draw_queue *debug_draw_samples(void);
+void debug_draw_flush(void);
+void debug_draw_enable(bool state);
+bool debug_draw_state(void);
+
+void debug_push_line(debug_v2 a, debug_v2 b, int32_t color);
+void debug_push_circle(debug_v2 pos, float radius, int32_t color);
+void debug_push_rect(debug_v2 bmin, debug_v2 bmax, int32_t color);
+

code/game/src/debug_ui.c

@@ -1,4 +1,5 @@
 #include "debug_ui.h"
+#include "debug_draw.h"
 #include "raylib.h"
 #include "vehicle.h"
 #include "camera.h"
@@ -289,6 +290,9 @@ debug_draw_result debug_draw_list(debug_item *list, float xpos, float ypos, bool
 }
 
 void debug_draw(void) {
+    // NOTE(zaklaus): Flush old debug samples
+    debug_draw_flush();
+    
     float xpos = debug_xpos;
     float ypos = debug_ypos;
     

code/game/src/debug_ui_actions.c

@@ -197,8 +197,8 @@ ActSpawnDemoNPCs(void) {
         pos->y=rand() % world_dim();        
         
         Velocity *v = ecs_get_mut(world_ecs(), e, Velocity, NULL);
-        v->x = (rand()%3-1) * 100;
+        v->x = (rand()%3-1) * 10;
-        v->y = (rand()%3-1) * 100;
+        v->y = (rand()%3-1) * 10;
         
         zpl_array_append(demo_npcs, e);
     }

code/game/src/platform_raylib.c

@@ -103,6 +103,15 @@ void platform_input() {
             renderer_switch(1-gfx_kind);
         }
     }
+    
+    // NOTE(zaklaus): toggle debug drawing
+#ifndef ECO2D_PROD
+    {
+        if (IsKeyPressed(KEY_T)) {
+            debug_draw_enable(!debug_draw_state());
+        }
+    }
+#endif
 }
 
 void platform_render() {
@@ -116,6 +125,7 @@ void platform_render() {
         profile (PROF_RENDER) {
             renderer_draw();
         }
+        renderer_debug_draw();
         debug_draw();
         display_conn_status();
     }

code/game/src/renderer_3d.c

@@ -131,3 +131,8 @@ void renderer_shutdown_3d(void) {
     blocks_destroy();
     assets_destroy();
 }
+
+
+void renderer_debug_draw_3d(void) {
+    
+}

code/game/src/renderer_bridge.c

@@ -1,3 +1,4 @@
+#include "debug_draw.h"
 #include "renderer_3d.c"
 #include "renderer_v0.c"
 
@@ -6,12 +7,14 @@
 #define renderer_init renderer_init_v0
 #define renderer_shutdown renderer_shutdown_v0
 #define renderer_draw renderer_draw_v0
+#define renderer_debug_draw renderer_debug_draw_v0
 void renderer_switch(int kind) {}
 #elif GFX_KIND == 1
 // NOTE(zaklaus): renderer_3d
 #define renderer_init renderer_init_3d
 #define renderer_shutdown renderer_shutdown_3d
 #define renderer_draw renderer_draw_3d
+#define renderer_debug_draw renderer_debug_draw_3d
 void renderer_switch(int kind) {}
 #elif GFX_KIND == 2
 // NOTE(zaklaus): hybrid mode
@@ -50,6 +53,17 @@ void renderer_shutdown(void) {
     }
 }
 
+void renderer_debug_draw(void) {
+    switch (gfx_kind) {
+        case 0:{
+            renderer_debug_draw_v0();
+        }break;
+        case 1:{
+            renderer_debug_draw_3d();
+        }break;
+    }
+}
+
 void renderer_bake_chunk(uint64_t key, entity_view * data) {
     if (data->kind != EKIND_CHUNK) return;
     world_view *view = game_world_view_get_active();

code/game/src/renderer_v0.c

@@ -67,8 +67,8 @@ void DEBUG_draw_entities(uint64_t key, entity_view * data) {
             DrawCircleEco(x, y, size, ColorAlpha(PURPLE, data->tran_time));
         }break;
         case EKIND_ITEM: {
-            float x = data->x;
+            float x = data->x - 32.f;
-            float y = data->y;
+            float y = data->y - 32.f;
             DrawTexturePro(GetSpriteTexture2D(assets_find(data->asset)), ASSET_SRC_RECT(), ASSET_DST_RECT(x,y), (Vector2){0.5f,0.5f}, 0.0f, ALPHA(WHITE));
         }break;
         default:break;
@@ -132,3 +132,43 @@ void renderer_shutdown_v0(void) {
     blocks_destroy();
     assets_destroy();
 }
+
+void renderer_debug_draw_v0(void) {
+    BeginMode2D(render_camera);
+    debug_draw_queue *que = debug_draw_samples();
+    
+    for (size_t i = 0; i < que->num_entries; i += 1) {
+        debug_draw_entry *e = &que->entries[i];
+        Color color = GetColor(e->color);
+        
+        switch (e->kind) {
+            case DDRAW_LINE: {
+                float x = e->a.x;
+                float y = e->a.y;
+                float x2 = e->b.x;
+                float y2 = e->b.y;
+                DrawLine(x, y, x2, y2, color);
+            }break;
+            
+            case DDRAW_CIRCLE:{
+                float x = e->a.x;
+                float y = e->a.y;
+                DrawCircleLines(x, y, e->radius, color);
+            }break;
+            
+            case DDRAW_RECT:{
+                float x = e->bmin.x;
+                float y = e->bmin.y;
+                float w = e->bmax.x - e->bmin.x;
+                float h = e->bmax.y - e->bmin.y;
+                DrawRectangleLines(x, y, w, h, color);
+            }break;
+            
+            default: {
+                
+            }break;
+        }
+    }
+    
+    EndMode2D();
+}

code/modules/modules/systems.c

@@ -4,6 +4,7 @@
 #include "world/world.h"
 #include "world/blocks.h"
 #include "profiler.h"
+#include "debug_draw.h"
 #include "game.h"
 
 #define PHY_BLOCK_COLLISION 1
@@ -50,6 +51,12 @@ void IntegratePositions(ecs_iter_t *it) {
             
             p[i].x += v[i].x * it->delta_time;
             p[i].y += v[i].y * it->delta_time;
+            
+            {
+                debug_v2 a = {p[i].x, p[i].y};
+                debug_v2 b = {p[i].x+v[i].x, p[i].y+v[i].y};
+                debug_push_line(a, b, 0xFFFFFFFF);
+            }
         }
     }
 }
@@ -59,6 +66,12 @@ void UpdateTrackerPos(ecs_iter_t *it) {
     
     for (int i = 0; i < it->count; i++){
         librg_entity_chunk_set(world_tracker(), it->entities[i], librg_chunk_from_realpos(world_tracker(), p[i].x, p[i].y, 0));
+        
+        {
+            debug_v2 a = {p[i].x-2.5f, p[i].y-2.5f};
+            debug_v2 b = {p[i].x+2.5f, p[i].y+2.5f};
+            debug_push_rect(a, b, 0x00FFFFFF);
+        }
     }
 }
 
@@ -128,7 +141,7 @@ void SystemsImport(ecs_world_t *ecs) {
     
     ECS_SYSTEM(ecs, IntegratePositions, EcsOnValidate, components.Position, components.Velocity);
     
-    ECS_SYSTEM(ecs, UpdateTrackerPos, EcsPostUpdate, components.Position);
+    ECS_SYSTEM(ecs, UpdateTrackerPos, EcsPostUpdate, components.Position, components.Velocity);
     
     ECS_SYSTEM(ecs, ClearVehicle, EcsUnSet, components.Vehicle);
     

code/modules/source/system_demo.c

@@ -1,12 +1,11 @@
 
-#define DEMO_NPC_CHANGEDIR_FACTOR 0.1
+#define DEMO_NPC_MOVE_SPEED 150
-#define DEMO_NPC_MOVE_SPEED 1500
 
 void DemoNPCMoveAround(ecs_iter_t *it) {
     Velocity *v = ecs_column(it, Velocity, 1);
     for (int i = 0; i < it->count; i++) {
-        v[i].x = zpl_lerp(v[i].x, (rand()%3-1)*DEMO_NPC_MOVE_SPEED, DEMO_NPC_CHANGEDIR_FACTOR);
+        v[i].x += (rand()%3-1)*DEMO_NPC_MOVE_SPEED;
-        v[i].y = zpl_lerp(v[i].y, (rand()%3-1)*DEMO_NPC_MOVE_SPEED, DEMO_NPC_CHANGEDIR_FACTOR);
+        v[i].y += (rand()%3-1)*DEMO_NPC_MOVE_SPEED;
     }
 }
 

code/modules/source/system_onfoot.c

@@ -1,18 +1,16 @@
-#define PLR_MOVE_SPEED 50.0
+#define PLR_MOVE_SPEED 30.0
 #define PLR_MOVE_SPEED_MULT 4.0
 
 void MovementImpulse(ecs_iter_t *it) {
     Input *in = ecs_column(it, Input, 1);
     Velocity *v = ecs_column(it, Velocity, 2);
-    Position *p = ecs_term(it, Position, 3);
+    Position *p = ecs_column(it, Position, 3);
     
     for (int i = 0; i < it->count; i++) {
         world_block_lookup lookup = world_block_from_realpos(p[i].x, p[i].y);
         float drag = zpl_clamp(blocks_get_drag(lookup.block_id), 0.0f, 1.0f);
         double speed = PLR_MOVE_SPEED * (in[i].sprint ? PLR_MOVE_SPEED_MULT : 1.0);
-        if (zpl_abs(v[i].x) < speed && in[i].x)
         v[i].x += in[i].x*speed*drag;
-        if (zpl_abs(v[i].y) < speed && in[i].y)
         v[i].y += in[i].y*speed*drag;
     }
 }

code/modules/source/system_vehicle.c

@@ -1,3 +1,4 @@
+#include "debug_draw.h"
 
 #define VEH_ENTER_RADIUS 45.0f
 
@@ -124,6 +125,17 @@ void VehicleHandling(ecs_iter_t *it) {
         v[i].x += (fr_x + bk_x) / 2.0f - p[i].x;
         v[i].y += (fr_y + bk_y) / 2.0f - p[i].y;
         car->heading = zpl_arctan2(fr_y - bk_y, fr_x - bk_x);
+        
+        {
+            debug_v2 b2 = {p[i].x + zpl_cos(car->heading)*(car->wheel_base), p[i].y + zpl_sin(car->heading)*(car->wheel_base)};
+            debug_push_line((debug_v2){p[i].x, p[i].y}, b2, 0x0000FFFF);
+            
+            {
+                float dx = zpl_cos(car->heading);
+                float dy = zpl_sin(car->heading);
+                debug_push_circle((debug_v2){p[i].x+dx*car->force, p[i].y+dy*car->force}, 5.0f, 0x00FF00FF);
+            }
+        }
     }
 }