further physics improvements

code/game/src/debug_ui_actions.c

@@ -42,8 +42,8 @@ ActSpawnCirclingDriver(void) {
     *dest = *origin;
     
     Input *input = ecs_get_mut(world_ecs(), e, Input, NULL);
+    zpl_zero_item(input);
     input->x = input->y = 1.0f;
-    input->use = false;
     
     Vehicle *veh = ecs_get_mut(world_ecs(), ve, Vehicle, NULL);
     veh->seats[0] = e;

code/game/src/renderer_v0.c

@@ -147,13 +147,13 @@ void renderer_debug_draw_v0(void) {
                 float y = e->a.y;
                 float x2 = e->b.x;
                 float y2 = e->b.y;
-                DrawLine(x, y, x2, y2, color);
+                DrawLineV((Vector2){x, y}, (Vector2){x2, y2}, color);
             }break;
             
             case DDRAW_CIRCLE:{
                 float x = e->a.x;
                 float y = e->a.y;
-                DrawCircleLines(x, y, e->radius, color);
+                DrawCircleLinesEco(x, y, e->radius, color);
             }break;
             
             case DDRAW_RECT:{
@@ -161,7 +161,7 @@ void renderer_debug_draw_v0(void) {
                 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);
+                DrawRectangleLinesEco(x, y, w, h, color);
             }break;
             
             default: {

code/game/src/utils/raylib_helpers.h

@@ -330,3 +330,39 @@ Color GenerateRandomColor(float s, float v) {
     h = fmodf((h + h*Phi), 360.0f);
     return ColorFromHSV(h, s, v);
 }
+
+
+// Draw circle outline
+void DrawCircleLinesEco(float centerX, float centerY, float radius, Color color)
+{
+    rlCheckRenderBatchLimit(2*36);
+    
+    rlBegin(RL_LINES);
+    rlColor4ub(color.r, color.g, color.b, color.a);
+    
+    // NOTE: Circle outline is drawn pixel by pixel every degree (0 to 360)
+    for (int i = 0; i < 360; i += 10)
+    {
+        rlVertex2f(centerX + sinf(DEG2RAD*i)*radius, centerY + cosf(DEG2RAD*i)*radius);
+        rlVertex2f(centerX + sinf(DEG2RAD*(i + 10))*radius, centerY + cosf(DEG2RAD*(i + 10))*radius);
+    }
+    rlEnd();
+}
+
+void DrawRectangleLinesEco(float posX, float posY, float width, float height, Color color)
+{
+    rlBegin(RL_LINES);
+    rlColor4ub(color.r, color.g, color.b, color.a);
+    rlVertex2f(posX + 1, posY + 1);
+    rlVertex2f(posX + width, posY + 1);
+    
+    rlVertex2f(posX + width, posY + 1);
+    rlVertex2f(posX + width, posY + height);
+    
+    rlVertex2f(posX + width, posY + height);
+    rlVertex2f(posX + 1, posY + height);
+    
+    rlVertex2f(posX + 1, posY + height);
+    rlVertex2f(posX + 1, posY + 1);
+    rlEnd();
+}

code/game/src/world/blocks_list.c

@@ -3,7 +3,7 @@
 static block blocks[] = {
     {.name = "base-ground", .flags = 0, .kind = BLOCK_KIND_GROUND, .biome = 0, .symbol = '.', .drag = 1.0f, .friction = 1.0f },
     {.name = "base-dirt", .flags = 0, .kind = BLOCK_KIND_DIRT, .biome = 0, .symbol = ',', .drag = 2.1f , .friction = 1.0f },
-    {.name = "base-wall", .flags = BLOCK_FLAG_COLLISION, .kind = BLOCK_KIND_WALL, .biome = 0, .symbol = '#', .drag = 1.0f , .friction = 1.0f, .bounce = 2.0f },
+    {.name = "base-wall", .flags = BLOCK_FLAG_COLLISION, .kind = BLOCK_KIND_WALL, .biome = 0, .symbol = '#', .drag = 1.0f , .friction = 1.0f, .bounce = 1.0f },
     {.name = "base-hill", .flags = BLOCK_FLAG_COLLISION, .kind = BLOCK_KIND_HILL, .biome = 0, .symbol = '^', .drag = 1.0f , .friction = 1.0f },
     {.name = "base-hill-snow", .flags = BLOCK_FLAG_COLLISION, .kind = BLOCK_KIND_HILL_SNOW, .biome = 0, .symbol = '*', .drag = 1.0f , .friction = 1.0f },
     {.name = "base-water", .flags = 0, .kind = BLOCK_KIND_WATER, .biome = 0, .symbol = '~', .drag = 0.11f , .friction = 1.0f },

code/modules/source/system_demo.c

@@ -1,11 +1,13 @@
 
-#define DEMO_NPC_MOVE_SPEED 150
+#define DEMO_NPC_MOVE_SPEED 50
+#define DEMO_NPC_STEER_SPEED 30
 
 void DemoNPCMoveAround(ecs_iter_t *it) {
     Velocity *v = ecs_column(it, Velocity, 1);
     for (int i = 0; i < it->count; i++) {
-        v[i].x += (rand()%3-1)*DEMO_NPC_MOVE_SPEED;
+        float d = zpl_quake_rsqrt(v[i].x*v[i].x + v[i].y*v[i].y);
-        v[i].y += (rand()%3-1)*DEMO_NPC_MOVE_SPEED;
+        v[i].x += (v[i].x*d*DEMO_NPC_MOVE_SPEED + zpl_cos(zpl_to_radians(rand()%360))*DEMO_NPC_STEER_SPEED);
+        v[i].y += (v[i].y*d*DEMO_NPC_MOVE_SPEED + zpl_sin(zpl_to_radians(rand()%360))*DEMO_NPC_STEER_SPEED);
     }
 }
 

code/modules/source/system_vehicle.c

@@ -135,6 +135,12 @@ void VehicleHandling(ecs_iter_t *it) {
         v[i].y += (fr_y + bk_y) / 2.0f - p[i].y;
         car->heading = zpl_arctan2(fr_y - bk_y, fr_x - bk_x);
         
+        world_block_lookup lookahead = world_block_from_realpos(p[i].x+PHY_LOOKAHEAD(v[i].x), p[i].y+PHY_LOOKAHEAD(v[i].y));
+        uint32_t flags = blocks_get_flags(lookahead.block_id);
+        if (flags & BLOCK_FLAG_COLLISION) {
+            car->force = 0.0f;
+        }
+        
         for (int j = 0; j < 4; j++) {
             if (!world_entity_valid(veh[i].seats[j])) continue;
             ecs_entity_t pe = veh[i].seats[j];