Basic animations

src/dawn/dawnlibs.hpp

@@ -31,6 +31,7 @@ extern "C" {
 #include <stb_truetype.h>
 #include <memory>
 #include <algorithm>
+#include <sstream> 
 // #include <iterator>
 // #include <algorithm>
 // #include <string>

src/dawn/display/CMakeLists.txt

@@ -11,5 +11,6 @@ target_sources(${DAWN_TARGET_NAME}
 )
 
 # Subdirs
+add_subdirectory(animation)
 add_subdirectory(font)
 add_subdirectory(mesh)

src/dawn/display/animation/Animation.hpp

@@ -0,0 +1,173 @@
+// Copyright (c) 2022 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "event/Event.hpp"
+#include "Easing.hpp"
+#include "util/mathutils.hpp"
+
+namespace Dawn {
+  template<typename T>
+  struct Keyframe {
+    float_t time;
+    T value;
+  };
+
+  template<typename T>
+  struct TimelineItem {
+    T *modifies;
+    std::vector<struct Keyframe<T>> keyframes;
+  };
+
+  template<typename T>
+  struct Animation {
+    public:
+      bool_t loop = false;
+      bool_t finished = false;
+      float_t time = 0;
+      float_t duration = 0;
+      easefunction_t *easing = &easeLinear;
+      std::vector<struct TimelineItem<T>> timelineItems;
+      Event<> eventAnimationEnd;
+
+      /**
+       * Get an existing timeline item based on the value that will be modified.
+       * 
+       * @param modifies Value that is intended to be modified for the timeline.
+       * @return The existing timeline item OR NULL if not found.
+       */
+      struct TimelineItem<T> * getTimelineItem(T *modifies) {
+        assertNotNull(modifies);
+
+        auto it = this->timelineItems.begin();
+        while(it != this->timelineItems.end()) {
+          if(it->modifies == modifies) return &(*it);
+          ++it;
+        }
+
+        return nullptr;
+      }
+
+      /**
+       * Add a timeline item to an animation.
+       * 
+       * @param modifies Value that will be modified for the timeline item.
+       * @return The timeline item for that modified value.
+       */
+      struct TimelineItem<T> * addTimelineItem(T *modifies) {
+        assertNotNull(modifies);
+        struct TimelineItem<T> item;
+        item.modifies = modifies;
+        this->timelineItems.push_back(item);
+        return &this->timelineItems.back();
+      }
+
+      /**
+       * Add a keyframe to the animation.
+       * 
+       * @param modifies Pointer to the value that will be modified.
+       * @param time Time that the animation will occur at (gametime seconds).
+       * @param value Value for this keyframe
+       * @return The keyframe that was added.
+       */
+      struct Keyframe<T> * addKeyframe(T *modifies, float_t time, T value) {
+        auto item = this->getTimelineItem(modifies);
+        if(item == nullptr) item = this->addTimelineItem(modifies);
+
+        struct Keyframe<T> keyframe;
+        keyframe.time = time;
+        keyframe.value = value;
+        this->duration = mathMax<float_t>(this->duration, time);
+        this->finished = false;
+
+        item->keyframes.push_back(keyframe);
+        return &item->keyframes.back();
+      }
+
+      /**
+       * Tick/Update the animation.
+       * 
+       * @param delta Delta (in seconds) to update the animation by.
+       */
+      void tick(float_t delta) {
+        if(this->finished) return;
+
+        float_t newTime = this->time + delta;
+
+        auto it = this->timelineItems.begin();
+        while(it != this->timelineItems.end()) {
+          struct Keyframe<T> *keyframeNext = nullptr;
+          struct Keyframe<T> *keyframeCurrent = nullptr;
+
+          // For each keyframe
+          auto itKey = it->keyframes.begin();
+          while(itKey != it->keyframes.end()) {
+            if(itKey->time > newTime) {
+              keyframeNext = &(*itKey);
+              break;
+            }
+            keyframeCurrent = &(*itKey);
+            ++itKey;
+          }
+
+          // Skip when no keyframe
+          float_t oldTime;
+          T oldValue;
+
+          if(keyframeCurrent == nullptr) {
+            if(keyframeNext == nullptr) continue;
+            oldTime = this->time;
+            oldValue = *it->modifies;
+          } else if(keyframeNext == nullptr) {
+            *it->modifies = keyframeCurrent->value;
+            ++it;
+            continue;
+          } else {
+            oldValue = keyframeCurrent->value;
+            oldTime = keyframeCurrent->time;
+          }
+
+          // Slerp between keyframes
+          float_t keyframeDelta = this->easing(
+            (newTime - oldTime) / (keyframeNext->time - oldTime)
+          );
+          *it->modifies = oldValue + (
+            (keyframeNext->value - oldValue) * keyframeDelta
+          );
+          ++it;
+        }
+
+        // Update time.
+        this->time = newTime;
+
+        // Has the animation finished?
+        if(newTime < this->duration) return;
+
+        // Do we need to loop?
+        if(this->loop) {
+          this->time = 0;
+          return;
+        }
+
+        // Animation end.
+        this->finished = true;
+
+        this->eventAnimationEnd.invoke();
+      }
+
+      void restart() {
+        this->time = 0;
+        this->finished = false;
+      }
+
+      /**
+       * Clears an animaton of all its animation items and keyframes.
+       */
+      void clear() {
+        this->timelineItems.clear();
+        this->duration = 0;
+      }
+  };
+}

src/dawn/display/animation/CMakeLists.txt

@@ -0,0 +1,10 @@
+# Copyright (c) 2022 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Sources
+# target_sources(${DAWN_TARGET_NAME}
+#   PRIVATE
+#     Animation.cpp
+# )

src/dawn/display/animation/Easing.hpp

@@ -7,6 +7,7 @@
 #pragma once
 #include "dawnlibs.hpp"
 
+
 typedef float_t easefunction_t(float_t t);
 
 /**

src/dawn/poker/PokerGame.cpp

@@ -25,7 +25,7 @@ void PokerGame::newGame() {
   auto it = this->players.begin();
   while(it != this->players.end()) {
     auto player = *it;
-    player->chips = POKER_PLAYER_CHIPS_DEFAULT;
+    player->setChips(POKER_PLAYER_CHIPS_DEFAULT);
     player->isOut = false;
     ++it;
   }

src/dawn/poker/PokerPlayer.cpp

@@ -24,6 +24,12 @@ void PokerPlayer::addChips(int32_t chips) {
 
   this->chips += chips;
   if(this->chips > 0) this->isOut = false;
+  eventChipsChanged.invoke();
+}
+
+void PokerPlayer::setChips(int32_t chips) {
+  this->chips = 0;
+  this->addChips(chips);
 }
 
 bool_t PokerPlayer::needsToBetThisRound() {
@@ -39,7 +45,7 @@ void PokerPlayer::bet(struct PokerPot *pot, int32_t chips) {
   assertTrue(chips >= 0);
   assertTrue(!this->isFolded);
   assertTrue(!this->isOut);
-  this->chips -= chips;
+  this->setChips(this->chips - chips);
   this->currentBet += chips;
   this->hasBetThisRound = true;
   if(chips > 0) {

src/dawn/poker/PokerPlayer.hpp

@@ -37,6 +37,8 @@ namespace Dawn {
       bool_t isHuman = false;
       std::vector<struct Card> hand;
 
+      Event<> eventChipsChanged;
+
       /**
        * Creates a PokerPlayer instance.
        * 
@@ -54,6 +56,13 @@ namespace Dawn {
        */
       void addChips(int32_t chips);
 
+      /**
+       * Sets the chips a player has.
+       * 
+       * @param chips Chips to set to the player.
+       */
+      void setChips(int32_t chips);
+
       /**
        * Returns true if the player still needs to bet this betting round.
        * 

src/dawn/ui/UIComponent.cpp

@@ -96,6 +96,14 @@ float_t UIComponent::getHeight() {
   return this->height;
 }
 
+float_t UIComponent::getContentWidth() {
+  return this->width;
+}
+
+float_t UIComponent::getContentHeight() {
+  return this->height;
+}
+
 float_t UIComponent::getRelativeX() {
   return this->relativeX;
 }
@@ -104,6 +112,14 @@ float_t UIComponent::getRelativeY() {
   return this->relativeY;
 }
 
+DawnGame * UIComponent::getGame() {
+  return this->canvas->getGame();
+}
+
+Scene * UIComponent::getScene() {
+  return this->canvas->getScene();
+}
+
 void UIComponent::setTransform(
   UIComponentAlign xAlign,
   UIComponentAlign yAlign,

src/dawn/ui/UIComponent.hpp

@@ -68,14 +68,30 @@ namespace Dawn {
        * 
        * @return Width of the component.
        */
-      float_t getWidth();
+      virtual float_t getWidth();
 
       /**
        * Returns the calculated height, based on the internal alignment values.
        * 
        * @return Height of the component.
        */
-      float_t getHeight();
+      virtual float_t getHeight();
+
+      /**
+       * Returns the internal width of the content within this element, e.g. 
+       * the content width.
+       * 
+       * @return Content width.
+       */
+      virtual float_t getContentWidth();
+
+      /**
+       * Returns the internal height of the content within this element, e.g. 
+       * the content height.
+       * 
+       * @return Content height.
+       */
+      virtual float_t getContentHeight();
 
       /**
        * Returns the X position, relative to this components' parent.
@@ -91,6 +107,20 @@ namespace Dawn {
        */
       float_t getRelativeY();
 
+      /**
+       * Gets the game that this UI component belongs to.
+       * 
+       * @return Game instance.
+       */
+      DawnGame * getGame();
+
+      /**
+       * Gets the scene that thsi UI Component belongs to.
+       * 
+       * @return Scene instance.
+       */
+      Scene * getScene();
+
       /**
        * Updates the transformation for this component.
        * 

src/dawn/ui/UILabel.cpp

@@ -21,7 +21,7 @@ void UILabel::updateMesh() {
   if(this->font == nullptr || !this->font->isReady()) return;
   if(this->text.size() == 0) return;
 
-  float_t width = this->getWidth();
+  float_t width = this->width;
   if(width == 0) width = -1;
 
   this->font->buffer(
@@ -54,6 +54,16 @@ void UILabel::setFontSize(float_t fontSize) {
   this->needsRebuffering = true;
 }
 
+float_t UILabel::getContentWidth() {
+  this->updateMesh();
+  return this->measure.getWidth();
+}
+
+float_t UILabel::getContentHeight() {
+  this->updateMesh();
+  return this->measure.getHeight();
+}
+
 void UILabel::drawSelf(UIShader *shader, glm::mat4 selfTransform) {
   if(this->font == nullptr || this->text.size() == 0) return;
 

src/dawn/ui/UILabel.hpp

@@ -29,6 +29,8 @@ namespace Dawn {
 
       UILabel(UICanvas *canvas);
       void drawSelf(UIShader *shader, glm::mat4 selfTransform) override;
+      virtual float_t getContentWidth() override;
+      virtual float_t getContentHeight() override;
       void setTransform(
         UIComponentAlign xAlign,
         UIComponentAlign yAlign,