give viewport to calculate correct world position (#8026)

Author: hiroMTB

libs/openFrameworks/3d/ofEasyCam.cpp

@@ -296,16 +296,16 @@ void ofEasyCam::updateTranslation(){
 		if(getOrtho()){
 			//In ortho mode moving along the z axis has no effect besides clipping.
 			// Instead, scale is applied to achieve the effect of getting near or far from the target.
-			glm::vec3 mousePre ;
+			glm::vec3 mousePre;
 			bool bDoScale = (currentTransformType == TRANSFORM_SCALE || currentTransformType == TRANSFORM_TRANSLATE_Z);
 			if (bDoScale) {
-				mousePre = screenToWorld(glm::vec3((bIsScrolling?mouseAtScroll:lastPressMouse),0));
+				mousePre = screenToWorld(glm::vec3((bIsScrolling?mouseAtScroll:lastPressMouse),0), viewport);
 			}
 			move(glm::vec3(lastPressAxisX * translate.x) + (lastPressAxisY * translate.y));
 			if (bDoScale) {
 				setScale(getScale() + translate.z);
 				// this move call is to keep the scaling centered below the mouse.
-				move(mousePre - screenToWorld(glm::vec3((bIsScrolling?mouseAtScroll:lastPressMouse),0)));
+				move(mousePre - screenToWorld(glm::vec3((bIsScrolling?mouseAtScroll:lastPressMouse),0), viewport));
 			}
 		}else{
 			move(glm::vec3(lastPressAxisX * translate.x) + (lastPressAxisY * translate.y) + (lastPressAxisZ * translate.z));