4731229459

Committed 18 Apr 2023 10:20AM CUT coverage: 96.368% (+0.2%) from 96.144%

Build Type

push

github

Committed by GitHub

Commit Message

Single grid coords & MatrixToGrid observer (#38)

Run Details

24 of 24 new or added lines in 1 file covered. (100.0%)

398 of 413 relevant lines covered (96.37%)

127.65 hits per line

Source File
Press 'n' to go to next uncovered line, 'b' for previous

97.27

/model/systems.go

package model

import (
        "fmt"
        "time"

        "github.com/mlange-42/arche-model/resource"
        "github.com/mlange-42/arche/ecs"
        "github.com/mlange-42/arche/generic"
)

// System is the interface for ECS systems.
//
// See also [UISystem] for systems with an independent graphics step.
type System interface {
        Initialize(w *ecs.World) // Initialize the system.
        Update(w *ecs.World)     // Update the system.
        Finalize(w *ecs.World)   // Finalize the system.
}

// UISystem is the interface for ECS systems that display UI in an independent graphics step.
//
// See also [System] for normal systems.
type UISystem interface {
        InitializeUI(w *ecs.World) // InitializeUI the system.
        UpdateUI(w *ecs.World)     // UpdateUI/update the system.
        PostUpdateUI(w *ecs.World) // PostUpdateUI does the final part of updating, e.g. update the GL window.
        FinalizeUI(w *ecs.World)   // FinalizeUI the system.
}

// Systems manages and schedules ECS [System] and [UISystem] instances.
//
// [System] instances are updated with a frequency given by TPS (ticks per second).
// [UISystem] instances are updated independently of normal systems, with a frequency given by FPS (frames per second).
//
// [Systems] is an embed in [Model] and it's methods are usually only used through a [Model] instance.
// By also being a resource of each [Model], however, systems can access it and e.g. remove themselves from a model.
type Systems struct {
        // Ticks per second for normal systems.
        // Values <= 0 (the default) mean as fast as possible.
        TPS float64
        // Frames per second for UI systems.
        // A zero/unset value defaults to 30 FPS. Values < 0 sync FPS with TPS.
        // With fast movement, a value of 60 may be required for fluent graphics.
        FPS float64
        // Whether the simulation is currently paused.
        // When paused, only UI updates but no normal updates are performed.
        Paused bool

        world      *ecs.World
        systems    []System
        uiSystems  []UISystem
        toRemove   []System
        uiToRemove []UISystem

        nextDraw   time.Time
        nextUpdate time.Time

        initialized bool
        locked      bool

        tickRes generic.Resource[resource.Tick]
        termRes generic.Resource[resource.Termination]
}

// AddSystem adds a [System] to the model.
//
// Panics if the system is also a [UISystem].
// To add systems that implement both [System] and [UISystem], use [Systems.AddUISystem]
func (s *Systems) AddSystem(sys System) {
        if s.initialized {
                panic("adding systems after model initialization is not implemented yet")
        }
        if sys, ok := sys.(UISystem); ok {
                panic(fmt.Sprintf("System %T is also an UI system. Must be added via AddSystem.", sys))
        }
        s.systems = append(s.systems, sys)
}

// AddUISystem adds an [UISystem] to the model.
//
// Adds the [UISystem] also as a normal [System] if it implements the interface.
func (s *Systems) AddUISystem(sys UISystem) {
        if s.initialized {
                panic("adding systems after model initialization is not implemented yet")
        }
        s.uiSystems = append(s.uiSystems, sys)
        if sys, ok := sys.(System); ok {
                s.systems = append(s.systems, sys)
        }
}

// RemoveSystem removes a system from the model.
//
// Systems can also be removed during a model run.
// However, this will take effect only after the end of the full model step.
func (s *Systems) RemoveSystem(sys System) {
        if sys, ok := sys.(UISystem); ok {
                panic(fmt.Sprintf("System %T is also an UI system. Must be removed via RemoveUISystem.", sys))
        }
        s.toRemove = append(s.toRemove, sys)
        if !s.locked {
                s.removeSystems()
        }
}

// RemoveUISystem removes an UI system from the model.
//
// Systems can also be removed during a model run.
// However, this will take effect only after the end of the full model step.
func (s *Systems) RemoveUISystem(sys UISystem) {
        s.uiToRemove = append(s.uiToRemove, sys)
        if !s.locked {
                s.removeSystems()
        }
}

// Removes systems that were removed during the model step.
func (s *Systems) removeSystems() {
        for _, sys := range s.toRemove {
                s.removeSystem(sys)
        }
        for _, sys := range s.uiToRemove {
                if sys, ok := sys.(System); ok {
                        s.removeSystem(sys)
                }
                s.removeUISystem(sys)
        }
        s.toRemove = s.toRemove[:0]
        s.uiToRemove = s.uiToRemove[:0]
}

func (s *Systems) removeSystem(sys System) {
        if s.locked {
                panic("can't remove a system in locked state")
        }
        idx := -1
        for i := 0; i < len(s.systems); i++ {
                if sys == s.systems[i] {
                        idx = i
                        break
                }
        }
        if idx < 0 {
                panic(fmt.Sprintf("can't remove system %T: not in the model", sys))
        }
        s.systems[idx].Finalize(s.world)
        s.systems = append(s.systems[:idx], s.systems[idx+1:]...)
}

func (s *Systems) removeUISystem(sys UISystem) {
        if s.locked {
                panic("can't remove a system in locked state")
        }
        idx := -1
        for i := 0; i < len(s.uiSystems); i++ {
                if sys == s.uiSystems[i] {
                        idx = i
                        break
                }
        }
        if idx < 0 {
                panic(fmt.Sprintf("can't remove UI system %T: not in the model", sys))
        }
        s.uiSystems[idx].FinalizeUI(s.world)
        s.uiSystems = append(s.uiSystems[:idx], s.uiSystems[idx+1:]...)
}

// Initialize all systems.
func (s *Systems) initialize() {
        if s.initialized {
                panic("model is already initialized")
        }

        if s.FPS == 0 {
                s.FPS = 30
        }

        s.tickRes = generic.NewResource[resource.Tick](s.world)
        s.termRes = generic.NewResource[resource.Termination](s.world)

        s.locked = true
        for _, sys := range s.systems {
                sys.Initialize(s.world)
        }
        for _, sys := range s.uiSystems {
                sys.InitializeUI(s.world)
        }
        s.locked = false
        s.removeSystems()
        s.initialized = true

        s.nextDraw = time.Time{}
        s.nextUpdate = time.Time{}
}

// Update all systems.
func (s *Systems) update() {
        s.locked = true
        update := s.updateSystems()
        s.updateUISystems(update)
        s.locked = false

        s.removeSystems()

        if update {
                time := s.tickRes.Get()
                time.Tick++
        } else {
                s.wait()
        }
}

// Calculates and waits the time until the next update of UI update.
func (s *Systems) wait() {
        nextUpdate := s.nextUpdate

        if (s.Paused || s.FPS > 0) && s.nextDraw.Before(nextUpdate) {
                nextUpdate = s.nextDraw
        }

        t := time.Now()
        wait := nextUpdate.Sub(t)

        if wait > 0 {
                time.Sleep(wait)
        }
}

// Update normal systems.
func (s *Systems) updateSystems() bool {
        if s.Paused {
                return false
        }
        update := false
        if s.TPS <= 0 {
                update = true
                for _, sys := range s.systems {
                        sys.Update(s.world)
                }
        } else {
                update = !time.Now().Before(s.nextUpdate)
                if update {
                        s.nextUpdate = nextTime(s.nextUpdate, s.TPS)
                        for _, sys := range s.systems {
                                sys.Update(s.world)
                        }
                }
        }
        return update
}

// Update UI systems.
func (s *Systems) updateUISystems(updated bool) {
        if len(s.uiSystems) > 0 {
                if !s.Paused && s.FPS <= 0 {
                        if updated {
                                for _, sys := range s.uiSystems {
                                        sys.UpdateUI(s.world)
                                }
                                for _, sys := range s.uiSystems {
                                        sys.PostUpdateUI(s.world)
                                }
                        }
                } else {
                        if !time.Now().Before(s.nextDraw) {
                                fps := s.FPS
                                if s.Paused {
                                        fps = 30
                                }
                                s.nextDraw = nextTime(s.nextDraw, fps)
                                for _, sys := range s.uiSystems {
                                        sys.UpdateUI(s.world)
                                }
                                for _, sys := range s.uiSystems {
                                        sys.PostUpdateUI(s.world)
                                }
                        }
                }
        }
}

// Finalize all systems.
func (s *Systems) finalize() {
        s.locked = true
        for _, sys := range s.systems {
                sys.Finalize(s.world)
        }
        for _, sys := range s.uiSystems {
                sys.FinalizeUI(s.world)
        }
        s.locked = false
        s.removeSystems()
}

// Run the model.
func (s *Systems) run() {
        if !s.initialized {
                s.initialize()
        }

        time := s.tickRes.Get()
        time.Tick = 0
        terminate := s.termRes.Get()

        for !terminate.Terminate {
                s.update()
        }

        s.finalize()
}

// Removes all systems.
func (s *Systems) reset() {
        s.systems = []System{}
        s.uiSystems = []UISystem{}
        s.toRemove = []System{}
        s.uiToRemove = []UISystem{}

        s.nextDraw = time.Time{}
        s.nextUpdate = time.Time{}

        s.initialized = false
        s.tickRes = generic.Resource[resource.Tick]{}
}

1	package model
2
3	import (
4	"fmt"
5	"time"
6
7	"github.com/mlange-42/arche-model/resource"
8	"github.com/mlange-42/arche/ecs"
9	"github.com/mlange-42/arche/generic"
10	)
11
12	// System is the interface for ECS systems.
13	//
14	// See also [UISystem] for systems with an independent graphics step.
15	type System interface {
16	Initialize(w *ecs.World) // Initialize the system.
17	Update(w *ecs.World) // Update the system.
18	Finalize(w *ecs.World) // Finalize the system.
19	}
20
21	// UISystem is the interface for ECS systems that display UI in an independent graphics step.
22	//
23	// See also [System] for normal systems.
24	type UISystem interface {
25	InitializeUI(w *ecs.World) // InitializeUI the system.
26	UpdateUI(w *ecs.World) // UpdateUI/update the system.
27	PostUpdateUI(w *ecs.World) // PostUpdateUI does the final part of updating, e.g. update the GL window.
28	FinalizeUI(w *ecs.World) // FinalizeUI the system.
29	}
30
31	// Systems manages and schedules ECS [System] and [UISystem] instances.
32	//
33	// [System] instances are updated with a frequency given by TPS (ticks per second).
34	// [UISystem] instances are updated independently of normal systems, with a frequency given by FPS (frames per second).
35	//
36	// [Systems] is an embed in [Model] and it's methods are usually only used through a [Model] instance.
37	// By also being a resource of each [Model], however, systems can access it and e.g. remove themselves from a model.
38	type Systems struct {
39	// Ticks per second for normal systems.
40	// Values <= 0 (the default) mean as fast as possible.
41	TPS float64
42	// Frames per second for UI systems.
43	// A zero/unset value defaults to 30 FPS. Values < 0 sync FPS with TPS.
44	// With fast movement, a value of 60 may be required for fluent graphics.
45	FPS float64
46	// Whether the simulation is currently paused.
47	// When paused, only UI updates but no normal updates are performed.
48	Paused bool
49
50	world *ecs.World
51	systems []System
52	uiSystems []UISystem
53	toRemove []System
54	uiToRemove []UISystem
55
56	nextDraw time.Time
57	nextUpdate time.Time
58
59	initialized bool
60	locked bool
61
62	tickRes generic.Resource[resource.Tick]
63	termRes generic.Resource[resource.Termination]
64	}
65
66	// AddSystem adds a [System] to the model.
67	//
68	// Panics if the system is also a [UISystem].
69	// To add systems that implement both [System] and [UISystem], use [Systems.AddUISystem]
70	func (s *Systems) AddSystem(sys System) {	35✔
71	if s.initialized {	38✔
72	panic("adding systems after model initialization is not implemented yet")	3✔
73	}
74	if sys, ok := sys.(UISystem); ok {	35✔
75	panic(fmt.Sprintf("System %T is also an UI system. Must be added via AddSystem.", sys))	3✔
76	}
77	s.systems = append(s.systems, sys)	29✔
78	}
79
80	// AddUISystem adds an [UISystem] to the model.
81	//
82	// Adds the [UISystem] also as a normal [System] if it implements the interface.
83	func (s *Systems) AddUISystem(sys UISystem) {	13✔
84	if s.initialized {	16✔
85	panic("adding systems after model initialization is not implemented yet")	3✔
86	}
87	s.uiSystems = append(s.uiSystems, sys)	10✔
88	if sys, ok := sys.(System); ok {	13✔
89	s.systems = append(s.systems, sys)	3✔
90	}	3✔
91	}
92
93	// RemoveSystem removes a system from the model.
94	//
95	// Systems can also be removed during a model run.
96	// However, this will take effect only after the end of the full model step.
97	func (s *Systems) RemoveSystem(sys System) {	10✔
98	if sys, ok := sys.(UISystem); ok {	13✔
99	panic(fmt.Sprintf("System %T is also an UI system. Must be removed via RemoveUISystem.", sys))	3✔
100	}
101	s.toRemove = append(s.toRemove, sys)	7✔
102	if !s.locked {	11✔
103	s.removeSystems()	4✔
104	}	4✔
105	}
106
107	// RemoveUISystem removes an UI system from the model.
108	//
109	// Systems can also be removed during a model run.
110	// However, this will take effect only after the end of the full model step.
111	func (s *Systems) RemoveUISystem(sys UISystem) {	12✔
112	s.uiToRemove = append(s.uiToRemove, sys)	12✔
113	if !s.locked {	21✔
114	s.removeSystems()	9✔
115	}	9✔
116	}
117
118	// Removes systems that were removed during the model step.
119	func (s *Systems) removeSystems() {	1,358✔
120	for _, sys := range s.toRemove {	1,368✔
121	s.removeSystem(sys)	10✔
122	}	10✔
123	for _, sys := range s.uiToRemove {	1,361✔
124	if sys, ok := sys.(System); ok {	15✔
125	s.removeSystem(sys)	6✔
126	}	6✔
127	s.removeUISystem(sys)	6✔
128	}
129	s.toRemove = s.toRemove[:0]	1,349✔
130	s.uiToRemove = s.uiToRemove[:0]	1,349✔
131	}
132
133	func (s *Systems) removeSystem(sys System) {	19✔
134	if s.locked {	22✔
135	panic("can't remove a system in locked state")	3✔
136	}
137	idx := -1	16✔
138	for i := 0; i < len(s.systems); i++ {	44✔
139	if sys == s.systems[i] {	35✔
140	idx = i	7✔
141	break	7✔
142	}
143	}
144	if idx < 0 {	25✔
145	panic(fmt.Sprintf("can't remove system %T: not in the model", sys))	9✔
146	}
147	s.systems[idx].Finalize(s.world)	7✔
148	s.systems = append(s.systems[:idx], s.systems[idx+1:]...)	7✔
149	}
150
151	func (s *Systems) removeUISystem(sys UISystem) {	9✔
152	if s.locked {	12✔
153	panic("can't remove a system in locked state")	3✔
154	}
155	idx := -1	6✔
156	for i := 0; i < len(s.uiSystems); i++ {	12✔
157	if sys == s.uiSystems[i] {	12✔
158	idx = i	6✔
159	break	6✔
160	}
161	}
162	if idx < 0 {	6✔
163	panic(fmt.Sprintf("can't remove UI system %T: not in the model", sys))	×
164	}
165	s.uiSystems[idx].FinalizeUI(s.world)	6✔
166	s.uiSystems = append(s.uiSystems[:idx], s.uiSystems[idx+1:]...)	6✔
167	}
168
169	// Initialize all systems.
170	func (s *Systems) initialize() {	25✔
171	if s.initialized {	28✔
172	panic("model is already initialized")	3✔
173	}
174
175	if s.FPS == 0 {	23✔
176	s.FPS = 30	1✔
177	}	1✔
178
179	s.tickRes = generic.NewResource[resource.Tick](s.world)	22✔
180	s.termRes = generic.NewResource[resource.Termination](s.world)	22✔
181		22✔
182	s.locked = true	22✔
183	for _, sys := range s.systems {	53✔
184	sys.Initialize(s.world)	31✔
185	}	31✔
186	for _, sys := range s.uiSystems {	32✔
187	sys.InitializeUI(s.world)	10✔
188	}	10✔
189	s.locked = false	22✔
190	s.removeSystems()	22✔
191	s.initialized = true	22✔
192		22✔
193	s.nextDraw = time.Time{}	22✔
194	s.nextUpdate = time.Time{}	22✔
195	}
196
197	// Update all systems.
198	func (s *Systems) update() {	1,301✔
199	s.locked = true	1,301✔
200	update := s.updateSystems()	1,301✔
201	s.updateUISystems(update)	1,301✔
202	s.locked = false	1,301✔
203		1,301✔
204	s.removeSystems()	1,301✔
205		1,301✔
206	if update {	2,581✔
207	time := s.tickRes.Get()	1,280✔
208	time.Tick++	1,280✔
209	} else {	1,301✔
210	s.wait()	21✔
211	}	21✔
212	}
213
214	// Calculates and waits the time until the next update of UI update.
215	func (s *Systems) wait() {	21✔
216	nextUpdate := s.nextUpdate	21✔
217		21✔
218	if (s.Paused \|\| s.FPS > 0) && s.nextDraw.Before(nextUpdate) {	33✔
219	nextUpdate = s.nextDraw	12✔
220	}	12✔
221
222	t := time.Now()	21✔
223	wait := nextUpdate.Sub(t)	21✔
224		21✔
225	if wait > 0 {	42✔
226	time.Sleep(wait)	21✔
227	}	21✔
228	}
229
230	// Update normal systems.
231	func (s *Systems) updateSystems() bool {	1,301✔
232	if s.Paused {	1,301✔
233	return false	×
234	}	×
235	update := false	1,301✔
236	if s.TPS <= 0 {	2,566✔
237	update = true	1,265✔
238	for _, sys := range s.systems {	2,602✔
239	sys.Update(s.world)	1,337✔
240	}	1,337✔
241	} else {	36✔
242	update = !time.Now().Before(s.nextUpdate)	36✔
243	if update {	51✔
244	s.nextUpdate = nextTime(s.nextUpdate, s.TPS)	15✔
245	for _, sys := range s.systems {	30✔
246	sys.Update(s.world)	15✔
247	}	15✔
248	}
249	}
250	return update	1,301✔
251	}
252
253	// Update UI systems.
254	func (s *Systems) updateUISystems(updated bool) {	1,301✔
255	if len(s.uiSystems) > 0 {	1,372✔
256	if !s.Paused && s.FPS <= 0 {	79✔
257	if updated {	13✔
258	for _, sys := range s.uiSystems {	10✔
259	sys.UpdateUI(s.world)	5✔
260	}	5✔
261	for _, sys := range s.uiSystems {	10✔
262	sys.PostUpdateUI(s.world)	5✔
263	}	5✔
264	}
265	} else {	63✔
266	if !time.Now().Before(s.nextDraw) {	93✔
267	fps := s.FPS	30✔
268	if s.Paused {	30✔
269	fps = 30	×
270	}	×
271	s.nextDraw = nextTime(s.nextDraw, fps)	30✔
272	for _, sys := range s.uiSystems {	66✔
273	sys.UpdateUI(s.world)	36✔
274	}	36✔
275	for _, sys := range s.uiSystems {	66✔
276	sys.PostUpdateUI(s.world)	36✔
277	}	36✔
278	}
279	}
280	}
281	}
282
283	// Finalize all systems.
284	func (s *Systems) finalize() {	22✔
285	s.locked = true	22✔
286	for _, sys := range s.systems {	50✔
287	sys.Finalize(s.world)	28✔
288	}	28✔
289	for _, sys := range s.uiSystems {	29✔
290	sys.FinalizeUI(s.world)	7✔
291	}	7✔
292	s.locked = false	22✔
293	s.removeSystems()	22✔
294	}
295
296	// Run the model.
297	func (s *Systems) run() {	22✔
298	if !s.initialized {	44✔
299	s.initialize()	22✔
300	}	22✔
301
302	time := s.tickRes.Get()	22✔
303	time.Tick = 0	22✔
304	terminate := s.termRes.Get()	22✔
305		22✔
306	for !terminate.Terminate {	1,323✔
307	s.update()	1,301✔
308	}	1,301✔
309
310	s.finalize()	22✔
311	}
312
313	// Removes all systems.
314	func (s *Systems) reset() {	16✔
315	s.systems = []System{}	16✔
316	s.uiSystems = []UISystem{}	16✔
317	s.toRemove = []System{}	16✔
318	s.uiToRemove = []UISystem{}	16✔
319		16✔
320	s.nextDraw = time.Time{}	16✔
321	s.nextUpdate = time.Time{}	16✔
322		16✔
323	s.initialized = false	16✔
324	s.tickRes = generic.Resource[resource.Tick]{}	16✔
325	}	16✔

mlange-42 / arche-model / 4731229459

Source File Press 'n' to go to next uncovered line, 'b' for previous

Source File
Press 'n' to go to next uncovered line, 'b' for previous