Add scale and rotation factor

Model parts can now have different scale and rotation factors, so all
parts do not need to rotate and scale with the head.

src/model.cpp

@@ -9,7 +9,7 @@
 #define BUFFER_SIZE_TEXTURE	16777220	// 16 MiB
 
 #define SUPPORTED_MODEL_MAJOR 0
-#define SUPPORTED_MODEL_MINOR 1
+#define SUPPORTED_MODEL_MINOR 2
 
 void textureFromArchive(zip_t* archive, const char* path, ModelPart* part, size_t slot, std::string triggerName) {
 	zip_file_t* textureFile = zip_fopen(archive, path, 0);
@@ -118,6 +118,17 @@ Model::Model(const char* path) {
 			}
 		}
 
+		// rotation and scale factor
+		auto rotFacResult = partsVec[i].getDouble("rot_factor");
+		auto scaleFacResult = partsVec[i].getDouble("scale_factor");
+
+		if (rotFacResult.first) {
+			newPart.setRotationFactor((float)rotFacResult.second);
+		}
+		if (scaleFacResult.first) {
+			newPart.setScaleFactor((float)scaleFacResult.second);
+		}
+
 		// texture
 		auto textureSingle = partsVec[i].getString("texture");
 

src/modelpart.cpp

@@ -44,10 +44,18 @@ void ModelPart::setFollowFactor(float followFactor) {
 	factor = followFactor;
 }
 
+void ModelPart::setRotationFactor(float rotationFactor) {
+	rotFactor = rotationFactor;
+}
+
+void ModelPart::setScaleFactor(float scaleFac) {
+	scaleFactor = scaleFac;
+}
+
 void ModelPart::setTransform(glm::vec2 position, float rotation, float scale) {
 	transMatrix = glm::translate(glm::mat4(1.0f), glm::vec3(position.x, -position.y, 0.0f));
-	transMatrix = glm::rotate(transMatrix, rotation, glm::vec3(0.0f, 0.0f, 1.0f));
-	transMatrix = glm::scale(transMatrix, glm::vec3(scale, scale, scale));
+	transMatrix = glm::rotate(transMatrix, rotation * rotFactor, glm::vec3(0.0f, 0.0f, 1.0f));
+	transMatrix = glm::scale(transMatrix, glm::vec3(1,1,1) + (scale - 1) * scaleFactor);
 }
 
 void ModelPart::processFaceData(struct FaceData faceData) {

src/modelpart.hpp

@@ -28,6 +28,9 @@ class ModelPart {
 	int follow = BIND_NULL;
 	float factor = 0.0f;	//default factor of 0 so part will not follow a null by default
 
+	float rotFactor = 1.0f;
+	float scaleFactor = 1.0f;
+
 	bool empty = true;
 	
 	public:
@@ -39,6 +42,9 @@ class ModelPart {
 		void setFollowTarget(std::string followString);
 		void setFollowFactor(float followFactor);
 
+		void setRotationFactor(float rotationFactor);
+		void setScaleFactor(float scaleFactor);
+
 		void setTransform(glm::vec2 position, float rotation, float scale);
 
 		void processFaceData(struct FaceData faceData);