1 files changed, 93 insertions, 0 deletions

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+#include "animation.h"
+#include <string_view>
+#include <fstream>
+#include <stdexcept>
+#include <string>
+#include <regex>
+#include <list>
+#include "direction.h"
+#include "util.h"
+
+Animation::Animation(std::string_view path) {
+  std::ifstream datafile(path.data());
+  if (!datafile.is_open()) {
+    throw std::invalid_argument(std::string("Could not find sprite datafile: ") + path.data());
+  }
+
+  std::string animLine;
+  char ch;
+  int cellWidth;
+  int cellHeight;
+  datafile >> cellWidth;
+  datafile >> ch; //,
+  datafile >> cellHeight;
+  std::getline(datafile, animLine); // cell size
+
+  int framesPerRow;
+  datafile >> framesPerRow;
+  std::getline(datafile, animLine); // frames per row
+
+  int numFrames;
+  datafile >> numFrames;
+  std::getline(datafile, animLine); // frames
+  std::getline(datafile, animLine); // blank
+
+  for (int i=0; i<numFrames; i++) {
+    SDL_Rect srcRect;
+    srcRect.x = (i % framesPerRow) * cellWidth;
+    srcRect.y = (i / framesPerRow) * cellHeight;
+    srcRect.w = cellWidth;
+    srcRect.h = cellHeight;
+    frames_.push_back(srcRect);
+  }
+
+  while (std::getline(datafile, animLine)) {
+    std::regex re(R"(([a-z!._]+)\[([a-z_]+)\]: ([0-9,]+))");
+    std::smatch m;
+    std::regex_match(animLine, m, re);
+
+    std::string animName = m[1];
+    std::vector<int> anim;
+    auto framestrs = splitStr<std::list<std::string>>(m[3], ",");
+    for (const std::string& f : framestrs) {
+      anim.push_back(std::stoi(f));
+    }
+
+    int animId = animations_.size();
+    animations_.push_back(std::move(anim));
+
+    Direction dir = directionFromString(std::string(m[2]));
+    nameDirToAnim_[animName][dir] = animId;
+  }
+
+  updateAnim();
+}
+
+void Animation::setDirection(Direction dir) {
+  dir_ = dir;
+  updateAnim();
+}
+
+void Animation::setAnimation(std::string_view anim) {
+  animationName_ = anim;
+  updateAnim();
+}
+
+void Animation::update(int dt) {
+  animTimer_.accumulate(dt);
+
+  while (animTimer_.step()) {
+    animationFrame_++;
+
+    if (animationFrame_ >= animations_.at(animationId_).size()) {
+      animationFrame_ = 0;
+    }
+  }
+}
+
+void Animation::updateAnim() {
+  if (nameDirToAnim_.at(animationName_).at(dir_) != animationId_) {
+    animationId_ = nameDirToAnim_.at(animationName_).at(dir_);
+    animationFrame_ = 0;
+  }
+}