Zachary Levy
bca19277b3
Major rework to draw rendering system. We are making a SDF first rendering system with tesselated stuff only as a fallback strategy for specific situations where SDF is particularly poorly suited Co-authored-by: Zachary Levy <zachary@sunforge.is> Reviewed-on: #17
383 lines
9.8 KiB
Odin
383 lines
9.8 KiB
Odin
package examples
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import "../../draw"
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import "../../draw/tess"
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import "../../vendor/clay"
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import "core:math"
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import "core:os"
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import sdl "vendor:sdl3"
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JETBRAINS_MONO_REGULAR_RAW :: #load("fonts/JetBrainsMono-Regular.ttf")
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JETBRAINS_MONO_REGULAR: draw.Font_Id = max(draw.Font_Id) // Max so we crash if registration is forgotten
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hellope_shapes :: proc() {
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if !sdl.Init({.VIDEO}) do os.exit(1)
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window := sdl.CreateWindow("Hellope!", 500, 500, {.HIGH_PIXEL_DENSITY})
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gpu := sdl.CreateGPUDevice(draw.PLATFORM_SHADER_FORMAT, true, nil)
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if !sdl.ClaimWindowForGPUDevice(gpu, window) do os.exit(1)
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if !draw.init(gpu, window) do os.exit(1)
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spin_angle: f32 = 0
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for {
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defer free_all(context.temp_allocator)
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ev: sdl.Event
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for sdl.PollEvent(&ev) {
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if ev.type == .QUIT do return
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}
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spin_angle += 1
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base_layer := draw.begin({width = 500, height = 500})
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// Background
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draw.rectangle(base_layer, {0, 0, 500, 500}, draw.Color{40, 40, 40, 255})
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// ----- Shapes without rotation (existing demo) -----
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draw.rectangle(
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base_layer,
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{20, 20, 200, 120},
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draw.Color{80, 120, 200, 255},
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outline_color = draw.WHITE,
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outline_width = 2,
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radii = {top_right = 15, top_left = 5},
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)
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red_rect_raddi := draw.uniform_radii({240, 20, 240, 120}, 0.3)
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red_rect_raddi.bottom_left = 0
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draw.rectangle(base_layer, {240, 20, 240, 120}, draw.Color{200, 80, 80, 255}, radii = red_rect_raddi)
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draw.rectangle(
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base_layer,
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{20, 160, 460, 60},
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{255, 0, 0, 255},
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gradient = draw.Linear_Gradient{end_color = {0, 0, 255, 255}, angle = 0},
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)
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// ----- Rotation demos -----
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// Rectangle rotating around its center
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rect := draw.Rectangle{100, 320, 80, 50}
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draw.rectangle(
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base_layer,
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rect,
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draw.Color{100, 200, 100, 255},
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outline_color = draw.WHITE,
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outline_width = 2,
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origin = draw.center_of(rect),
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rotation = spin_angle,
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feather_px = 1,
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)
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// Rounded rectangle rotating around its center
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rrect := draw.Rectangle{230, 300, 100, 80}
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draw.rectangle(
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base_layer,
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rrect,
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draw.Color{200, 100, 200, 255},
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radii = draw.uniform_radii(rrect, 0.4),
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origin = draw.center_of(rrect),
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rotation = spin_angle,
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)
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// Ellipse rotating around its center (tilted ellipse)
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draw.ellipse(base_layer, {410, 340}, 50, 30, {255, 200, 50, 255}, rotation = spin_angle)
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// Circle orbiting a point (moon orbiting planet)
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// Convention B: center = pivot point (planet), origin = offset from moon center to pivot.
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// Moon's visual center at rotation=0: planet_pos - origin = (100, 450) - (0, 40) = (100, 410).
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planet_pos := draw.Vec2{100, 450}
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draw.circle(base_layer, planet_pos, 8, {200, 200, 200, 255}) // planet (stationary)
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draw.circle(
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base_layer,
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planet_pos,
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5,
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{100, 150, 255, 255},
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origin = draw.Vec2{0, 40},
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rotation = spin_angle,
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) // moon orbiting
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// Sector (pie slice) rotating in place
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draw.ring(
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base_layer,
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draw.Vec2{250, 450},
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0,
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30,
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{100, 100, 220, 255},
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start_angle = 0,
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end_angle = 270,
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rotation = spin_angle,
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)
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// Triangle rotating around its center
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tv1 := draw.Vec2{350, 420}
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tv2 := draw.Vec2{420, 480}
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tv3 := draw.Vec2{340, 480}
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tess.triangle_aa(
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base_layer,
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tv1,
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tv2,
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tv3,
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{220, 180, 60, 255},
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origin = draw.center_of(tv1, tv2, tv3),
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rotation = spin_angle,
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)
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// Polygon rotating around its center (already had rotation; now with origin for orbit)
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draw.polygon(
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base_layer,
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{460, 450},
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6,
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30,
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{180, 100, 220, 255},
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outline_color = draw.WHITE,
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outline_width = 2,
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rotation = spin_angle,
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)
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draw.end(gpu, window)
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}
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}
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hellope_text :: proc() {
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HELLOPE_ID :: 1
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ROTATING_SENTENCE_ID :: 2
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MEASURED_ID :: 3
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CORNER_SPIN_ID :: 4
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if !sdl.Init({.VIDEO}) do os.exit(1)
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window := sdl.CreateWindow("Hellope!", 600, 600, {.HIGH_PIXEL_DENSITY})
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gpu := sdl.CreateGPUDevice(draw.PLATFORM_SHADER_FORMAT, true, nil)
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if !sdl.ClaimWindowForGPUDevice(gpu, window) do os.exit(1)
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if !draw.init(gpu, window) do os.exit(1)
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JETBRAINS_MONO_REGULAR = draw.register_font(JETBRAINS_MONO_REGULAR_RAW)
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FONT_SIZE :: u16(24)
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spin_angle: f32 = 0
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for {
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defer free_all(context.temp_allocator)
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ev: sdl.Event
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for sdl.PollEvent(&ev) {
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if ev.type == .QUIT do return
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}
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spin_angle += 0.5
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base_layer := draw.begin({width = 600, height = 600})
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// ----- Text API demos -----
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// Cached text with id — TTF_Text reused across frames (good for text-heavy apps)
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draw.text(
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base_layer,
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"Hellope!",
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{300, 80},
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JETBRAINS_MONO_REGULAR,
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FONT_SIZE,
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color = draw.WHITE,
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origin = draw.center_of("Hellope!", JETBRAINS_MONO_REGULAR, FONT_SIZE),
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id = HELLOPE_ID,
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)
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// Rotating sentence — verifies multi-word text rotation around center
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draw.text(
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base_layer,
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"Hellope World!",
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{300, 250},
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JETBRAINS_MONO_REGULAR,
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FONT_SIZE,
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color = {255, 200, 50, 255},
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origin = draw.center_of("Hellope World!", JETBRAINS_MONO_REGULAR, FONT_SIZE),
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rotation = spin_angle,
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id = ROTATING_SENTENCE_ID,
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)
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// Uncached text (no id) — created and destroyed each frame, simplest usage
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draw.text(
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base_layer,
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"Top-left anchored",
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{20, 450},
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JETBRAINS_MONO_REGULAR,
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FONT_SIZE,
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color = draw.WHITE,
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)
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// Measure text for manual layout
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size := draw.measure_text("Measured!", JETBRAINS_MONO_REGULAR, FONT_SIZE)
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draw.rectangle(base_layer, {300 - size.x / 2, 380, size.x, size.y}, draw.Color{60, 60, 60, 200})
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draw.text(
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base_layer,
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"Measured!",
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{300, 380},
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JETBRAINS_MONO_REGULAR,
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FONT_SIZE,
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color = draw.WHITE,
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origin = draw.top_of("Measured!", JETBRAINS_MONO_REGULAR, FONT_SIZE),
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id = MEASURED_ID,
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)
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// Rotating text anchored at top-left (no origin offset) — spins around top-left corner
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draw.text(
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base_layer,
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"Corner spin",
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{150, 530},
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JETBRAINS_MONO_REGULAR,
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FONT_SIZE,
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color = {100, 200, 255, 255},
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rotation = spin_angle,
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id = CORNER_SPIN_ID,
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)
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draw.end(gpu, window, draw.Color{127, 127, 127, 255})
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}
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}
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hellope_clay :: proc() {
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if !sdl.Init({.VIDEO}) do os.exit(1)
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window := sdl.CreateWindow("Hellope!", 500, 500, {.HIGH_PIXEL_DENSITY})
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gpu := sdl.CreateGPUDevice(draw.PLATFORM_SHADER_FORMAT, true, nil)
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if !sdl.ClaimWindowForGPUDevice(gpu, window) do os.exit(1)
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if !draw.init(gpu, window) do os.exit(1)
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JETBRAINS_MONO_REGULAR = draw.register_font(JETBRAINS_MONO_REGULAR_RAW)
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text_config := clay.TextElementConfig {
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fontId = JETBRAINS_MONO_REGULAR,
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fontSize = 36,
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textColor = {255, 255, 255, 255},
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}
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for {
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defer free_all(context.temp_allocator)
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ev: sdl.Event
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for sdl.PollEvent(&ev) {
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if ev.type == .QUIT do return
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}
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base_layer := draw.begin({width = 500, height = 500})
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clay.SetLayoutDimensions({width = base_layer.bounds.width, height = base_layer.bounds.height})
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clay.BeginLayout()
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if clay.UI()(
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{
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id = clay.ID("outer"),
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layout = {
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sizing = {clay.SizingGrow({}), clay.SizingGrow({})},
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childAlignment = {x = .Center, y = .Center},
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},
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backgroundColor = {127, 127, 127, 255},
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},
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) {
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clay.Text("Hellope!", &text_config)
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}
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clay_batch := draw.ClayBatch {
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bounds = base_layer.bounds,
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cmds = clay.EndLayout(),
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}
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draw.prepare_clay_batch(base_layer, &clay_batch, {0, 0})
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draw.end(gpu, window)
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}
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}
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hellope_custom :: proc() {
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if !sdl.Init({.VIDEO}) do os.exit(1)
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window := sdl.CreateWindow("Hellope Custom!", 600, 400, {.HIGH_PIXEL_DENSITY})
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gpu := sdl.CreateGPUDevice(draw.PLATFORM_SHADER_FORMAT, true, nil)
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if !sdl.ClaimWindowForGPUDevice(gpu, window) do os.exit(1)
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if !draw.init(gpu, window) do os.exit(1)
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JETBRAINS_MONO_REGULAR = draw.register_font(JETBRAINS_MONO_REGULAR_RAW)
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text_config := clay.TextElementConfig {
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fontId = JETBRAINS_MONO_REGULAR,
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fontSize = 24,
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textColor = {255, 255, 255, 255},
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}
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gauge := Gauge {
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value = 0.73,
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color = {50, 200, 100, 255},
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}
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gauge2 := Gauge {
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value = 0.45,
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color = {200, 100, 50, 255},
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}
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spin_angle: f32 = 0
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for {
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defer free_all(context.temp_allocator)
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ev: sdl.Event
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for sdl.PollEvent(&ev) {
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if ev.type == .QUIT do return
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}
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spin_angle += 1
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gauge.value = (math.sin(spin_angle * 0.02) + 1) * 0.5
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gauge2.value = (math.cos(spin_angle * 0.03) + 1) * 0.5
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base_layer := draw.begin({width = 600, height = 400})
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clay.SetLayoutDimensions({width = base_layer.bounds.width, height = base_layer.bounds.height})
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clay.BeginLayout()
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if clay.UI()(
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{
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id = clay.ID("outer"),
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layout = {
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sizing = {clay.SizingGrow({}), clay.SizingGrow({})},
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childAlignment = {x = .Center, y = .Center},
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layoutDirection = .TopToBottom,
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childGap = 20,
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},
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backgroundColor = {50, 50, 50, 255},
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},
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) {
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if clay.UI()({id = clay.ID("title"), layout = {sizing = {clay.SizingFit({}), clay.SizingFit({})}}}) {
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clay.Text("Custom Draw Demo", &text_config)
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}
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if clay.UI()(
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{
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id = clay.ID("gauge"),
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layout = {sizing = {clay.SizingFixed(300), clay.SizingFixed(30)}},
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custom = {customData = &gauge},
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backgroundColor = {80, 80, 80, 255},
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},
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) {}
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if clay.UI()(
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{
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id = clay.ID("gauge2"),
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layout = {sizing = {clay.SizingFixed(300), clay.SizingFixed(30)}},
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custom = {customData = &gauge2},
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backgroundColor = {80, 80, 80, 255},
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},
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) {}
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}
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clay_batch := draw.ClayBatch {
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bounds = base_layer.bounds,
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cmds = clay.EndLayout(),
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}
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draw.prepare_clay_batch(base_layer, &clay_batch, {0, 0}, custom_draw = draw_custom)
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draw.end(gpu, window)
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}
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Gauge :: struct {
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value: f32,
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color: draw.Color,
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}
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draw_custom :: proc(layer: ^draw.Layer, bounds: draw.Rectangle, render_data: clay.CustomRenderData) {
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gauge := cast(^Gauge)render_data.customData
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border_width: f32 = 2
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draw.rectangle(
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layer,
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bounds,
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draw.color_from_clay(render_data.backgroundColor),
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outline_color = draw.WHITE,
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outline_width = border_width,
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)
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fill := draw.Rectangle {
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x = bounds.x,
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y = bounds.y,
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width = bounds.width * gauge.value,
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height = bounds.height,
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}
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draw.rectangle(layer, fill, gauge.color)
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}
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}
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