cass.cityboundforest.com
A dungeon delver roguelike using Pathfinder 2nd edition rules
1package main
2
3import (
4 "time"
5
6 "github.com/g3n/engine/app"
7 "github.com/g3n/engine/camera"
8 "github.com/g3n/engine/core"
9 "github.com/g3n/engine/geometry"
10 "github.com/g3n/engine/gls"
11 "github.com/g3n/engine/graphic"
12 "github.com/g3n/engine/gui"
13 "github.com/g3n/engine/light"
14 "github.com/g3n/engine/material"
15 "github.com/g3n/engine/math32"
16 "github.com/g3n/engine/renderer"
17 "github.com/g3n/engine/util/helper"
18 "github.com/g3n/engine/window"
19)
20
21func main() {
22 // Create application and scene
23 a := app.App()
24 scene := core.NewNode()
25
26 // Set the scene to be managed by the gui manager
27 gui.Manager().Set(scene)
28
29 // Create perspective camera
30 cam := camera.New(1)
31 cam.SetPosition(0, 0, 3)
32 scene.Add(cam)
33
34 // Set up orbit control for the camera
35 camera.NewOrbitControl(cam)
36
37 // Set up callback to update viewport and camera aspect ratio when the window is resized
38 onResize := func(evname string, ev any) {
39 // Get framebuffer size and update viewport accordingly
40 width, height := a.GetSize()
41 a.Gls().Viewport(0, 0, int32(width), int32(height))
42 // Update the camera's aspect ratio
43 cam.SetAspect(float32(width) / float32(height))
44 }
45
46 a.Subscribe(window.OnWindowSize, onResize)
47 onResize("", nil)
48
49 // Create a blue torus and add it to the screen
50 geom := geometry.NewTorus(1, 0.4, 12, 32, math32.Pi*2)
51 mat := material.NewStandard(math32.NewColor("DarkBlue"))
52 mesh := graphic.NewMesh(geom, mat)
53 scene.Add(mesh)
54
55 // Create and add a button to the scene
56 btn := gui.NewButton("Make Red")
57 btn.SetPosition(100, 40)
58 btn.SetSize(40, 40)
59 btn.Subscribe(gui.OnClick, func(name string, ev any) {
60 mat.SetColor(math32.NewColor("DarkRed"))
61 })
62 scene.Add(btn)
63
64 // Create and add lights to the scene
65 scene.Add(light.NewAmbient(&math32.Color{1.0, 1.0, 1.0}, 8.0))
66 pointLight := light.NewPoint(&math32.Color{1.0, 1.0, 1.0}, 5.0)
67 pointLight.SetPosition(1, 0, 2)
68 scene.Add(pointLight)
69
70 // Create and add an axis helper to the scene
71 scene.Add(helper.NewAxes(0.5))
72
73 // Set background color to gray
74 a.Gls().ClearColor(0.5, 0.5, 0.5, 1.0)
75
76 // Run the application
77 a.Run(func(renderer *renderer.Renderer, deltaTime time.Duration) {
78 a.Gls().Clear(gls.DEPTH_BUFFER_BIT | gls.STENCIL_BUFFER_BIT | gls.COLOR_BUFFER_BIT)
79 renderer.Render(scene, cam)
80 })
81}