diff --git a/geotypes.cpp b/geotypes.cpp
index 43c8b1c..26451a0 100644
--- a/geotypes.cpp
+++ b/geotypes.cpp
@@ -127,7 +127,7 @@ bool Ray::onRay(Punkt3D p, int rnd) {
 	else if(g3)
 		return (r1 == r2);
 	else
-		return (r1 == r2 == r3);
+		return ((r1 == r2) == r3);
 }
 
 float Ray::dist(Punkt3D p) {
@@ -215,7 +215,7 @@ bool Plane::collision(const Plane &p) const {
 }
 
 float Plane::dist(Punkt3D p) const {
-	
+	return 0.0f;
 }
 
 } // namespace segl
diff --git a/model/model.cpp b/model/model.cpp
index ddad10d..951a847 100644
--- a/model/model.cpp
+++ b/model/model.cpp
@@ -156,7 +156,7 @@ Model::~Model() {
 	unload();
 }
 
-const Punkt3D* Model::getMeshData(unsigned int *meshanz) {
+const Punkt3D* Model::getMeshData(unsigned int *meshanz) const {
 	*meshanz = meshdataanz;
 	return (const Punkt3D*)meshdata;
 }
diff --git a/model/model.h b/model/model.h
index 7c88ee6..fbdb716 100644
--- a/model/model.h
+++ b/model/model.h
@@ -84,10 +84,10 @@ class Model {
 		void unload();
 		void render();
 		
-		Quader getBoundingBox() { return boundingbox; }
-		float getBoundingRad() { return boundingrad; }
+		Quader getBoundingBox() const { return boundingbox; }
+		float getBoundingRad() const { return boundingrad; }
 		
-		const Punkt3D* getMeshData(unsigned int *meshanz);
+		const Punkt3D* getMeshData(unsigned int *meshanz) const;
 };
 
 } // namespace segl