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Add FPS panel

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This commit is contained in:
Jared Miller 2025-12-15 11:23:56 -05:00
parent 6b8d1e1929
commit 788263b7fe
1 changed files with 16 additions and 8 deletions
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24
src/ui.zig
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@ -27,19 +27,27 @@ pub const box_bg = rl.Color{ .r = 0, .g = 0, .b = 0, .a = 200 };
pub fn drawMetrics(entities: *const sandbox.Entities, update_us: i64, render_us: i64, paused: bool, font: rl.Font) void { pub fn drawMetrics(entities: *const sandbox.Entities, update_us: i64, render_us: i64, paused: bool, font: rl.Font) void {
var buf: [256]u8 = undefined; var buf: [256]u8 = undefined;
var y: f32 = padding;
// dark background for readability // fps box (above metrics)
const fps_box_height: i32 = 26;
rl.drawRectangle(5, 5, 180, fps_box_height, box_bg);
const frame_ms = rl.getFrameTime() * 1000.0;
const fps = if (frame_ms > 0) 1000.0 / frame_ms else 0;
const fps_text = std.fmt.bufPrintZ(&buf, "FPS: {d:.0}", .{fps}) catch "?";
rl.drawTextEx(font, fps_text, .{ .x = padding, .y = padding }, font_size, 0, text_color);
// metrics box (below fps)
const metrics_y: i32 = 5 + fps_box_height + 5;
var y: f32 = @as(f32, @floatFromInt(metrics_y)) + box_padding;
const bg_height: i32 = if (paused) 130 else 100; const bg_height: i32 = if (paused) 130 else 100;
rl.drawRectangle(5, 5, 180, bg_height, box_bg); rl.drawRectangle(5, metrics_y, 180, bg_height, box_bg);
// entity count // entity count
const count_text = std.fmt.bufPrintZ(&buf, "entities: {d}", .{entities.count}) catch "?"; const count_text = std.fmt.bufPrintZ(&buf, "entities: {d}", .{entities.count}) catch "?";
rl.drawTextEx(font, count_text, .{ .x = padding, .y = y }, font_size, 0, text_color); rl.drawTextEx(font, count_text, .{ .x = padding, .y = y }, font_size, 0, text_color);
y += line_height; y += line_height;
// frame time // frame time (frame_ms already calculated above for fps)
const frame_ms = rl.getFrameTime() * 1000.0;
const frame_text = std.fmt.bufPrintZ(&buf, "frame: {d:.1}ms", .{frame_ms}) catch "?"; const frame_text = std.fmt.bufPrintZ(&buf, "frame: {d:.1}ms", .{frame_ms}) catch "?";
rl.drawTextEx(font, frame_text, .{ .x = padding, .y = y }, font_size, 0, text_color); rl.drawTextEx(font, frame_text, .{ .x = padding, .y = y }, font_size, 0, text_color);
y += line_height; y += line_height;
@ -63,12 +71,12 @@ pub fn drawMetrics(entities: *const sandbox.Entities, update_us: i64, render_us:
} }
// controls legend // controls legend
drawControls(font, bg_height); drawControls(font, metrics_y + bg_height);
} }
fn drawControls(font: rl.Font, metrics_height: i32) void { fn drawControls(font: rl.Font, metrics_bottom: i32) void {
const ctrl_box_height: i32 = @intFromFloat(small_line_height * 4 + box_padding * 2); const ctrl_box_height: i32 = @intFromFloat(small_line_height * 4 + box_padding * 2);
const ctrl_box_y: i32 = 5 + metrics_height + 5; const ctrl_box_y: i32 = metrics_bottom + 5;
rl.drawRectangle(5, ctrl_box_y, 175, ctrl_box_height, box_bg); rl.drawRectangle(5, ctrl_box_y, 175, ctrl_box_height, box_bg);
var y: f32 = @as(f32, @floatFromInt(ctrl_box_y)) + box_padding; var y: f32 = @as(f32, @floatFromInt(ctrl_box_y)) + box_padding;