add 'region', 'region-scale' properties

src/coders/vcm.cpp

@@ -32,6 +32,9 @@ static void perform_rect(const xmlelement& root, model::Model& model) {
     } else {
         region.scale(glm::length(right), glm::length(up));
     }
+    if (root.has("region-scale")) {
+        region.scale(root.attr("region-scale").asVec2());
+    }
 
     auto flip = root.attr("flip", "").getText();
     if (flip == "h") {
@@ -87,6 +90,12 @@ static void perform_box(const xmlelement& root, model::Model& model) {
                 if (elem->has("texture")) {
                     texfaces[idx] = elem->attr("texture").getText();
                 }
+                if (elem->has("region")) {
+                    regions[idx].set(elem->attr("region").asVec4());
+                }
+                if (elem->has("region-scale")) {
+                    regions[idx].scale(elem->attr("region-scale").asVec2());
+                }
             }
         }
     }
@@ -131,7 +140,9 @@ static std::unique_ptr<model::Model> load_model(const xmlelement& root) {
     return std::make_unique<model::Model>(std::move(model));
 }
 
-std::unique_ptr<model::Model> vcm::parse(std::string_view file, std::string_view src) {
+std::unique_ptr<model::Model> vcm::parse(
+    std::string_view file, std::string_view src
+) {
     auto doc = xml::parse(file, src);
     const auto& root = *doc->getRoot();
     if (root.getTag() != "model") {

src/maths/UVRegion.hpp

@@ -53,6 +53,10 @@ struct UVRegion {
         v2 = cy + h * 0.5f * y;
     }
 
+    void scale(const glm::vec2& vec) {
+        scale(vec.x, vec.y);
+    }
+
     void set(const glm::vec4& vec) {
         u1 = vec.x;
         v1 = vec.y;