Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2019 Google LLC |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "ParticlesSlide.h" |
| 9 | |
Mike Klein | cd5104e | 2019-03-20 11:55:08 -0500 | [diff] [blame^] | 10 | #include "AnimTimer.h" |
Brian Osman | 112aa2d | 2019-02-15 10:45:56 -0500 | [diff] [blame] | 11 | #include "ImGuiLayer.h" |
Mike Reed | 58a7538 | 2019-03-02 17:57:20 -0500 | [diff] [blame] | 12 | #include "Resources.h" |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 13 | #include "SkOSFile.h" |
| 14 | #include "SkOSPath.h" |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 15 | #include "SkParticleAffector.h" |
Brian Osman | 543d2e2 | 2019-02-15 14:29:38 -0500 | [diff] [blame] | 16 | #include "SkParticleDrawable.h" |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 17 | #include "SkParticleEffect.h" |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 18 | #include "SkParticleSerialization.h" |
| 19 | #include "SkReflected.h" |
| 20 | |
| 21 | #include "imgui.h" |
| 22 | |
| 23 | using namespace sk_app; |
| 24 | |
| 25 | namespace { |
| 26 | |
| 27 | static SkScalar kDragSize = 8.0f; |
| 28 | static SkTArray<SkPoint*> gDragPoints; |
| 29 | int gDragIndex = -1; |
| 30 | |
| 31 | } |
| 32 | |
| 33 | /////////////////////////////////////////////////////////////////////////////// |
| 34 | |
| 35 | static int InputTextCallback(ImGuiInputTextCallbackData* data) { |
| 36 | if (data->EventFlag == ImGuiInputTextFlags_CallbackResize) { |
| 37 | SkString* s = (SkString*)data->UserData; |
| 38 | SkASSERT(data->Buf == s->writable_str()); |
| 39 | SkString tmp(data->Buf, data->BufTextLen); |
| 40 | s->swap(tmp); |
| 41 | data->Buf = s->writable_str(); |
| 42 | } |
| 43 | return 0; |
| 44 | } |
| 45 | |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 46 | class SkGuiVisitor : public SkFieldVisitor { |
| 47 | public: |
| 48 | SkGuiVisitor() { |
| 49 | fTreeStack.push_back(true); |
| 50 | } |
| 51 | |
| 52 | #define IF_OPEN(WIDGET) if (fTreeStack.back()) { WIDGET; } |
| 53 | |
Brian Osman | 2991cbe | 2019-02-19 10:45:56 -0500 | [diff] [blame] | 54 | void visit(const char* name, float& f) override { |
| 55 | IF_OPEN(ImGui::DragFloat(item(name), &f)) |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 56 | } |
Brian Osman | 2991cbe | 2019-02-19 10:45:56 -0500 | [diff] [blame] | 57 | void visit(const char* name, int& i) override { |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 58 | IF_OPEN(ImGui::DragInt(item(name), &i)) |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 59 | } |
Brian Osman | 2991cbe | 2019-02-19 10:45:56 -0500 | [diff] [blame] | 60 | void visit(const char* name, bool& b) override { |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 61 | IF_OPEN(ImGui::Checkbox(item(name), &b)) |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 62 | } |
Brian Osman | 2991cbe | 2019-02-19 10:45:56 -0500 | [diff] [blame] | 63 | void visit(const char* name, SkString& s) override { |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 64 | if (fTreeStack.back()) { |
| 65 | ImGuiInputTextFlags flags = ImGuiInputTextFlags_CallbackResize; |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 66 | ImGui::InputText(item(name), s.writable_str(), s.size() + 1, flags, InputTextCallback, |
| 67 | &s); |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 68 | } |
| 69 | } |
Brian Osman | e5d532e | 2019-02-26 14:58:40 -0500 | [diff] [blame] | 70 | void visit(const char* name, int& i, const EnumStringMapping* map, int count) override { |
| 71 | if (fTreeStack.back()) { |
| 72 | const char* curStr = EnumToString(i, map, count); |
| 73 | if (ImGui::BeginCombo(item(name), curStr ? curStr : "Unknown")) { |
| 74 | for (int j = 0; j < count; ++j) { |
| 75 | if (ImGui::Selectable(map[j].fName, i == map[j].fValue)) { |
| 76 | i = map[j].fValue; |
| 77 | } |
| 78 | } |
| 79 | ImGui::EndCombo(); |
| 80 | } |
| 81 | } |
| 82 | } |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 83 | |
Brian Osman | 2991cbe | 2019-02-19 10:45:56 -0500 | [diff] [blame] | 84 | void visit(const char* name, SkPoint& p) override { |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 85 | if (fTreeStack.back()) { |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 86 | ImGui::DragFloat2(item(name), &p.fX); |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 87 | gDragPoints.push_back(&p); |
| 88 | } |
| 89 | } |
Brian Osman | 2991cbe | 2019-02-19 10:45:56 -0500 | [diff] [blame] | 90 | void visit(const char* name, SkColor4f& c) override { |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 91 | IF_OPEN(ImGui::ColorEdit4(item(name), c.vec())) |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 92 | } |
| 93 | |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 94 | #undef IF_OPEN |
| 95 | |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 96 | void visit(sk_sp<SkReflected>& e, const SkReflected::Type* baseType) override { |
| 97 | if (fTreeStack.back()) { |
| 98 | const SkReflected::Type* curType = e ? e->getType() : nullptr; |
| 99 | if (ImGui::BeginCombo("Type", curType ? curType->fName : "Null")) { |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 100 | auto visitType = [baseType, curType, &e](const SkReflected::Type* t) { |
| 101 | if (t->fFactory && (t == baseType || t->isDerivedFrom(baseType)) && |
| 102 | ImGui::Selectable(t->fName, curType == t)) { |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 103 | e = t->fFactory(); |
| 104 | } |
| 105 | }; |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 106 | SkReflected::VisitTypes(visitType); |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 107 | ImGui::EndCombo(); |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | void enterObject(const char* name) override { |
| 113 | if (fTreeStack.back()) { |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 114 | fTreeStack.push_back(ImGui::TreeNodeEx(item(name), |
| 115 | ImGuiTreeNodeFlags_AllowItemOverlap)); |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 116 | } else { |
| 117 | fTreeStack.push_back(false); |
| 118 | } |
| 119 | } |
| 120 | void exitObject() override { |
| 121 | if (fTreeStack.back()) { |
| 122 | ImGui::TreePop(); |
| 123 | } |
| 124 | fTreeStack.pop_back(); |
| 125 | } |
| 126 | |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 127 | int enterArray(const char* name, int oldCount) override { |
| 128 | this->enterObject(item(name)); |
| 129 | fArrayCounterStack.push_back(0); |
| 130 | fArrayEditStack.push_back(); |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 131 | |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 132 | int count = oldCount; |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 133 | if (fTreeStack.back()) { |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 134 | ImGui::SameLine(); |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 135 | if (ImGui::Button("+")) { |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 136 | ++count; |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 137 | } |
| 138 | } |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 139 | return count; |
| 140 | } |
| 141 | ArrayEdit exitArray() override { |
| 142 | fArrayCounterStack.pop_back(); |
| 143 | auto edit = fArrayEditStack.back(); |
| 144 | fArrayEditStack.pop_back(); |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 145 | this->exitObject(); |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 146 | return edit; |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | private: |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 150 | const char* item(const char* name) { |
| 151 | if (name) { |
| 152 | return name; |
| 153 | } |
| 154 | |
| 155 | // We're in an array. Add extra controls and a dynamic label. |
| 156 | int index = fArrayCounterStack.back()++; |
| 157 | ArrayEdit& edit(fArrayEditStack.back()); |
| 158 | fScratchLabel = SkStringPrintf("[%d]", index); |
| 159 | |
| 160 | ImGui::PushID(index); |
| 161 | |
| 162 | if (ImGui::Button("X")) { |
| 163 | edit.fVerb = ArrayEdit::Verb::kRemove; |
| 164 | edit.fIndex = index; |
| 165 | } |
| 166 | ImGui::SameLine(); |
| 167 | if (ImGui::Button("^")) { |
| 168 | edit.fVerb = ArrayEdit::Verb::kMoveForward; |
| 169 | edit.fIndex = index; |
| 170 | } |
| 171 | ImGui::SameLine(); |
| 172 | if (ImGui::Button("v")) { |
| 173 | edit.fVerb = ArrayEdit::Verb::kMoveForward; |
| 174 | edit.fIndex = index + 1; |
| 175 | } |
| 176 | ImGui::SameLine(); |
| 177 | |
| 178 | ImGui::PopID(); |
| 179 | |
| 180 | return fScratchLabel.c_str(); |
| 181 | } |
| 182 | |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 183 | SkSTArray<16, bool, true> fTreeStack; |
Brian Osman | 5de7ea4 | 2019-02-14 13:23:51 -0500 | [diff] [blame] | 184 | SkSTArray<16, int, true> fArrayCounterStack; |
| 185 | SkSTArray<16, ArrayEdit, true> fArrayEditStack; |
| 186 | SkString fScratchLabel; |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 187 | }; |
| 188 | |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 189 | ParticlesSlide::ParticlesSlide() { |
| 190 | // Register types for serialization |
| 191 | REGISTER_REFLECTED(SkReflected); |
| 192 | SkParticleAffector::RegisterAffectorTypes(); |
Brian Osman | 543d2e2 | 2019-02-15 14:29:38 -0500 | [diff] [blame] | 193 | SkParticleDrawable::RegisterDrawableTypes(); |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 194 | fName = "Particles"; |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 195 | fPlayPosition.set(200.0f, 200.0f); |
| 196 | } |
| 197 | |
| 198 | void ParticlesSlide::loadEffects(const char* dirname) { |
| 199 | fLoaded.reset(); |
| 200 | fRunning.reset(); |
| 201 | SkOSFile::Iter iter(dirname, ".json"); |
| 202 | for (SkString file; iter.next(&file); ) { |
| 203 | LoadedEffect effect; |
| 204 | effect.fName = SkOSPath::Join(dirname, file.c_str()); |
| 205 | effect.fParams.reset(new SkParticleEffectParams()); |
| 206 | if (auto fileData = SkData::MakeFromFileName(effect.fName.c_str())) { |
| 207 | skjson::DOM dom(static_cast<const char*>(fileData->data()), fileData->size()); |
| 208 | SkFromJsonVisitor fromJson(dom.root()); |
| 209 | effect.fParams->visitFields(&fromJson); |
| 210 | fLoaded.push_back(effect); |
| 211 | } |
| 212 | } |
Ben Wagner | a57d868 | 2019-02-14 13:22:43 -0500 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | void ParticlesSlide::load(SkScalar winWidth, SkScalar winHeight) { |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 216 | this->loadEffects(GetResourcePath("particles").c_str()); |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | void ParticlesSlide::draw(SkCanvas* canvas) { |
| 220 | canvas->clear(0); |
| 221 | |
| 222 | gDragPoints.reset(); |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 223 | gDragPoints.push_back(&fPlayPosition); |
| 224 | |
| 225 | // Window to show all loaded effects, and allow playing them |
| 226 | if (ImGui::Begin("Library", nullptr, ImGuiWindowFlags_AlwaysVerticalScrollbar)) { |
Brian Osman | 5c1f8eb | 2019-02-14 14:49:55 -0500 | [diff] [blame] | 227 | static bool looped = true; |
| 228 | ImGui::Checkbox("Looped", &looped); |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 229 | |
| 230 | static SkString dirname = GetResourcePath("particles"); |
| 231 | ImGuiInputTextFlags textFlags = ImGuiInputTextFlags_CallbackResize; |
| 232 | ImGui::InputText("Directory", dirname.writable_str(), dirname.size() + 1, textFlags, |
| 233 | InputTextCallback, &dirname); |
| 234 | |
| 235 | if (ImGui::Button("New")) { |
| 236 | LoadedEffect effect; |
| 237 | effect.fName = SkOSPath::Join(dirname.c_str(), "new.json"); |
| 238 | effect.fParams.reset(new SkParticleEffectParams()); |
| 239 | fLoaded.push_back(effect); |
Brian Osman | 5c1f8eb | 2019-02-14 14:49:55 -0500 | [diff] [blame] | 240 | } |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 241 | ImGui::SameLine(); |
| 242 | |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 243 | if (ImGui::Button("Load")) { |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 244 | this->loadEffects(dirname.c_str()); |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 245 | } |
| 246 | ImGui::SameLine(); |
| 247 | |
| 248 | if (ImGui::Button("Save")) { |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 249 | for (const auto& effect : fLoaded) { |
| 250 | SkFILEWStream fileStream(effect.fName.c_str()); |
| 251 | if (fileStream.isValid()) { |
| 252 | SkJSONWriter writer(&fileStream, SkJSONWriter::Mode::kPretty); |
| 253 | SkToJsonVisitor toJson(writer); |
| 254 | writer.beginObject(); |
| 255 | effect.fParams->visitFields(&toJson); |
| 256 | writer.endObject(); |
| 257 | writer.flush(); |
| 258 | fileStream.flush(); |
| 259 | } else { |
| 260 | SkDebugf("Failed to open %s\n", effect.fName.c_str()); |
| 261 | } |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 262 | } |
| 263 | } |
| 264 | |
| 265 | SkGuiVisitor gui; |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 266 | for (int i = 0; i < fLoaded.count(); ++i) { |
| 267 | ImGui::PushID(i); |
| 268 | if (fTimer && ImGui::Button("Play")) { |
| 269 | sk_sp<SkParticleEffect> effect(new SkParticleEffect(fLoaded[i].fParams, fRandom)); |
| 270 | effect->start(fTimer->secs(), looped); |
| 271 | fRunning.push_back({ fPlayPosition, fLoaded[i].fName, effect }); |
| 272 | } |
| 273 | ImGui::SameLine(); |
| 274 | |
| 275 | ImGui::InputText("##Name", fLoaded[i].fName.writable_str(), fLoaded[i].fName.size() + 1, |
| 276 | textFlags, InputTextCallback, &fLoaded[i].fName); |
| 277 | |
| 278 | if (ImGui::TreeNode("##Details")) { |
| 279 | fLoaded[i].fParams->visitFields(&gui); |
| 280 | ImGui::TreePop(); |
| 281 | } |
| 282 | ImGui::PopID(); |
| 283 | } |
| 284 | } |
| 285 | ImGui::End(); |
| 286 | |
| 287 | // Another window to show all the running effects |
| 288 | if (ImGui::Begin("Running")) { |
| 289 | for (int i = 0; i < fRunning.count(); ++i) { |
| 290 | ImGui::PushID(i); |
| 291 | bool remove = ImGui::Button("X") || !fRunning[i].fEffect->isAlive(); |
| 292 | ImGui::SameLine(); |
| 293 | ImGui::Text("%4g, %4g %5d %s", fRunning[i].fPosition.fX, fRunning[i].fPosition.fY, |
| 294 | fRunning[i].fEffect->getCount(), fRunning[i].fName.c_str()); |
| 295 | if (remove) { |
| 296 | fRunning.removeShuffle(i); |
| 297 | } |
| 298 | ImGui::PopID(); |
| 299 | } |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 300 | } |
| 301 | ImGui::End(); |
| 302 | |
| 303 | SkPaint dragPaint; |
| 304 | dragPaint.setColor(SK_ColorLTGRAY); |
| 305 | dragPaint.setAntiAlias(true); |
| 306 | SkPaint dragHighlight; |
| 307 | dragHighlight.setStyle(SkPaint::kStroke_Style); |
| 308 | dragHighlight.setColor(SK_ColorGREEN); |
| 309 | dragHighlight.setStrokeWidth(2); |
| 310 | dragHighlight.setAntiAlias(true); |
| 311 | for (int i = 0; i < gDragPoints.count(); ++i) { |
| 312 | canvas->drawCircle(*gDragPoints[i], kDragSize, dragPaint); |
| 313 | if (gDragIndex == i) { |
| 314 | canvas->drawCircle(*gDragPoints[i], kDragSize, dragHighlight); |
| 315 | } |
| 316 | } |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 317 | for (const auto& effect : fRunning) { |
| 318 | canvas->save(); |
| 319 | canvas->translate(effect.fPosition.fX, effect.fPosition.fY); |
| 320 | effect.fEffect->draw(canvas); |
| 321 | canvas->restore(); |
| 322 | } |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 323 | } |
| 324 | |
Mike Klein | cd5104e | 2019-03-20 11:55:08 -0500 | [diff] [blame^] | 325 | bool ParticlesSlide::animate(const AnimTimer& timer) { |
Brian Osman | 5c1f8eb | 2019-02-14 14:49:55 -0500 | [diff] [blame] | 326 | fTimer = &timer; |
Brian Osman | b77d502 | 2019-03-06 11:08:48 -0500 | [diff] [blame] | 327 | for (const auto& effect : fRunning) { |
| 328 | effect.fEffect->update(timer.secs()); |
| 329 | } |
Brian Osman | 7c979f5 | 2019-02-12 13:27:51 -0500 | [diff] [blame] | 330 | return true; |
| 331 | } |
| 332 | |
| 333 | bool ParticlesSlide::onMouse(SkScalar x, SkScalar y, Window::InputState state, uint32_t modifiers) { |
| 334 | if (gDragIndex == -1) { |
| 335 | if (state == Window::kDown_InputState) { |
| 336 | float bestDistance = kDragSize; |
| 337 | SkPoint mousePt = { x, y }; |
| 338 | for (int i = 0; i < gDragPoints.count(); ++i) { |
| 339 | float distance = SkPoint::Distance(*gDragPoints[i], mousePt); |
| 340 | if (distance < bestDistance) { |
| 341 | gDragIndex = i; |
| 342 | bestDistance = distance; |
| 343 | } |
| 344 | } |
| 345 | return gDragIndex != -1; |
| 346 | } |
| 347 | } else { |
| 348 | // Currently dragging |
| 349 | SkASSERT(gDragIndex < gDragPoints.count()); |
| 350 | gDragPoints[gDragIndex]->set(x, y); |
| 351 | if (state == Window::kUp_InputState) { |
| 352 | gDragIndex = -1; |
| 353 | } |
| 354 | return true; |
| 355 | } |
| 356 | return false; |
| 357 | } |