Better structure and size constants for pixel art resolution.

src/level_manager.odin

@@ -4,11 +4,18 @@ import "core:fmt"
 import rl "vendor:raylib"
 
 // ------------------------------------------------------------------------------
-// LEVEL specifics
+// LEVEL Specifics
 // ------------------------------------------------------------------------------
-FIELD_BORDER :: 3
+FIELD_BORDER    :: 2
 SERVE_WAIT_TIME :: 1.0
 
+// ------------------------------------------------------------------------------
+// HUD Styling Constants
+// ------------------------------------------------------------------------------
+HUD_FONT_SIZE    :: 10.0
+HUD_FONT_SPACING :: 1.0
+HUD_PADDING      :: 4.0
+
 Level :: struct {
     field_bounds: rl.Rectangle,
     player:       Entity,
@@ -19,19 +26,17 @@ Level :: struct {
     score_player: int,
     score_enemy:  int,
     score_win:    int,
+    particles:    [dynamic]Particle,
 }
 
 init_level :: proc() -> Level {
-    // positions work off viewport resolution, 
-    // independent of target display size
-    // 10% padding around the field 
-    pad_x := f32(VIEWPORT_W)  * 0.10
+    pad_x := f32(VIEWPORT_W) * 0.10
     pad_y := f32(VIEWPORT_H) * 0.10
 
     bounds := rl.Rectangle{
         x      = pad_x,
         y      = pad_y,
-        width  = f32(VIEWPORT_W)  - (pad_x * 2),
+        width  = f32(VIEWPORT_W) - (pad_x * 2),
         height = f32(VIEWPORT_H) - (pad_y * 2),
     }
 
@@ -53,18 +58,28 @@ init_level :: proc() -> Level {
         score_win    = 1,
         score_player = 0,
         score_enemy  = 0,
+        particles    = make([dynamic]Particle),
     }
 }
 
+// Free memory allocated by dynamic slice fields in the level struct
+cleanup_level :: proc(level: ^Level) {
+    delete(level.particles)
+}
+
 update_level :: proc(level: ^Level, input: Input_Event, dt: f32) {
     update_ball(&level.ball, level, dt)
     update_player(&level.player, input, level.field_bounds, dt)
     update_opponent(&level.opponent, level.ball, level.field_bounds, dt)
+    update_particles(&level.particles, dt)
 }
 
 render_level :: proc(level: Level) {
-    rl.DrawRectangleRec(level.field_bounds, rl.DARKGRAY)
-    rl.DrawRectangleLinesEx(level.field_bounds, FIELD_BORDER, rl.RAYWHITE)
+    rl.BeginBlendMode(.ADDITIVE)
+    // Draw outward field glow
+    render_field_outward_glow(level.field_bounds, FIELD_BORDER, rl.WHITE)
+    render_particles(level.particles)
+    rl.EndBlendMode()
 
     center_x := f32(VIEWPORT_W) / 2.0
     start_pos := rl.Vector2{center_x, level.field_bounds.y + FIELD_BORDER}
@@ -76,31 +91,42 @@ render_level :: proc(level: Level) {
     render_ball(level.ball, level.field_bounds)
 }
 
+render_field_outward_glow :: proc(bounds: rl.Rectangle, line_thickness: f32, glow_color: rl.Color) {
+    rl.DrawRectangleLinesEx(bounds, line_thickness, glow_color)
+
+    glow_layers := 24
+    glow_step   := f32(1.0)
+
+    for i in 1 ..= glow_layers {
+        offset := f32(i) * glow_step
+
+        outer_rec := rl.Rectangle{
+            x      = bounds.x - offset,
+            y      = bounds.y - offset,
+            width  = bounds.width + (offset * 2.0),
+            height = bounds.height + (offset * 2.0),
+        }
+
+        alpha := u8(155.0 / f32(i * i))
+        layer_color := rl.Color{glow_color.r, glow_color.g, glow_color.b, alpha}
+
+        rl.DrawRectangleLinesEx(outer_rec, line_thickness, layer_color)
+    }
+}
+
 render_hud :: proc(level: Level) {
-    // 2 spacing, 20 font size, 5 padding
     font := rl.GetFontDefault()
 
-    // player one id
-    p1_size := rl.MeasureTextEx(font, "PLAYER 1", 20, 2)
-    p1_box  := rl.Rectangle{5, 5, p1_size.x, p1_size.y}
-    p1_pos  := rl.Vector2{p1_box.x, p1_box.y}
-    rl.DrawTextEx(font, "PLAYER 1", p1_pos, 20, 2, rl.WHITE)
-    // rl.DrawRectangleLinesEx(p1_box, 1.0, rl.RED)
+    p1_size := rl.MeasureTextEx(font, "PLAYER 1", HUD_FONT_SIZE, HUD_FONT_SPACING)
+    p1_pos  := rl.Vector2{HUD_PADDING, HUD_PADDING}
+    rl.DrawTextEx(font, "PLAYER 1", p1_pos, HUD_FONT_SIZE, HUD_FONT_SPACING, rl.WHITE)
 
-    // opponent id
-    opp_size := rl.MeasureTextEx(font, "COMPUTER", 20, 2)
-    opp_box  := rl.Rectangle{(VIEWPORT_W - 5 - opp_size.x), 5, (opp_size.x), (opp_size.y)}
-    opp_pos  := rl.Vector2{opp_box.x, opp_box.y}
-    rl.DrawTextEx(font, "COMPUTER", opp_pos, 20, 2, rl.WHITE)
+    opp_size := rl.MeasureTextEx(font, "COMPUTER", HUD_FONT_SIZE, HUD_FONT_SPACING)
+    opp_pos  := rl.Vector2{f32(VIEWPORT_W) - HUD_PADDING - opp_size.x, HUD_PADDING}
+    rl.DrawTextEx(font, "COMPUTER", opp_pos, HUD_FONT_SIZE, HUD_FONT_SPACING, rl.WHITE)
 
-    // score box
-    // Format the score dynamically into a C-string allocated on the temp allocator
     score_text := fmt.ctprintf("%d : %d", level.score_player, level.score_enemy)
-    score_size := rl.MeasureTextEx(font, score_text, 20, 2)
-    score_box  := rl.Rectangle{(VIEWPORT_W / 2 - score_size.x / 2), 5, (score_size.x), (score_size.y)}
-    score_pos  := rl.Vector2{score_box.x, score_box.y}
-    rl.DrawTextEx(font, score_text, score_pos, 20, 2, rl.WHITE)
-
-    // game name
-    // rl.DrawRectangleLines(VIEWPORT_W / 2 - 50, VIEWPORT_H - 50, 100, 50, rl.RED)
-}
+    score_size := rl.MeasureTextEx(font, score_text, HUD_FONT_SIZE, HUD_FONT_SPACING)
+    score_pos  := rl.Vector2{(f32(VIEWPORT_W) * 0.5) - (score_size.x * 0.5), HUD_PADDING}
+    rl.DrawTextEx(font, score_text, score_pos, HUD_FONT_SIZE, HUD_FONT_SPACING, rl.WHITE)
+}