write it

src/settings.rs

@@ -1,33 +1,101 @@
+struct Ratio{
+	ratio:f64,
+}
 enum DerivedFov{
 	FromScreenAspect,
-	FromAspect{num:u32,den:u32},
+	FromAspect(Ratio),
 }
 enum Fov{
-	Exactly{x:f32,y:f32},
-	DeriveX{x:DerivedFov,y:f32},
-	DeriveY{x:f32,y:DerivedFov},
+	Exactly{x:f64,y:f64},
+	DeriveX{x:DerivedFov,y:f64},
+	DeriveY{x:f64,y:DerivedFov},
+}
+impl Default for Fov{
+	fn default() -> Self {
+		Fov::DeriveX{x:DerivedFov::FromScreenAspect,y:1.0}
+	}
 }
 
-struct DerivedSensitivity{
-	ratio:f32,
-}
 enum Sensitivity{
-	Exactly{x:f32,y:f32},
-	DeriveX{x:DerivedSensitivity,y:f32},
-	DeriveY{x:f32,y:DerivedSensitivity},
+	Exactly{x:f64,y:f64},
+	DeriveX{x:Ratio,y:f64},
+	DeriveY{x:f64,y:Ratio},
+}
+impl Default for Sensitivity{
+	fn default() -> Self {
+		Sensitivity::DeriveY{x:0.001,y:Ratio{ratio:1.0}}
+	}
 }
 
+#[derive(Default)]
 pub struct UserSettings{
 	fov:Fov,
 	sensitivity:Sensitivity,
 }
 
-pub fn read_user_settings(){
-	let mut sensitivity=1.0/1024.0;
+/*
+//sensitivity is raw input dots (i.e. dpi = dots per inch) to radians conversion factor
+sensitivity_x=0.001
+sensitivity_mul_x_to_y=1
+Sensitivity::DeriveY{x:0.0.001,y:DerivedSensitivity{ratio:1.0}}
+*/
+
+pub fn read_user_settings()->UserSettings{
 	if let Ok(file)=std::fs::File::open("settings.conf"){
 		let cfg=configparser::ini::Ini::new();
-		if let Ok(Some(sens))=cfg.getfloat("user","sensitivity_x"){
-			sensitivity=sens;
+		let (cfg_fov_x,cfg_fov_y)=(cfg.getfloat("camera","fov_x"),cfg.getfloat("camera","fov_x"));
+		let fov=match(cfg_fov_x,cfg_fov_y){
+			(Ok(Some(fov_x)),Ok(Some(fov_y)))=>Fov::Exactly {
+				x:fov_x,
+				y:fov_y
+			},
+			(Ok(Some(fov_x)),Ok(None))=>Fov::DeriveY{
+				x:fov_x,
+				y:if let Ok(Some(fov_mul_x_to_y))=cfg.getfloat("camera","fov_mul_x_to_y"){
+					DerivedFov::FromAspect(Ratio{ratio:fov_mul_x_to_y})
+				}else{
+					DerivedFov::FromScreenAspect
+				}
+			},
+			(Ok(None),Ok(Some(fov_y)))=>Fov::DeriveX{
+				x:if let Ok(Some(fov_mul_y_to_x))=cfg.getfloat("camera","fov_mul_y_to_x"){
+					DerivedFov::FromAspect(Ratio{ratio:fov_mul_y_to_x})
+				}else{
+					DerivedFov::FromScreenAspect
+				},
+				y:fov_y,
+			},
+			_=>{
+				Fov::default()
+			},
+		};
+		let (cfg_sensitivity_x,cfg_sensitivity_y)=(cfg.getfloat("camera","sensitivity_x"),cfg.getfloat("camera","sensitivity_x"));
+		let sensitivity=match(cfg_sensitivity_x,cfg_sensitivity_y){
+			(Ok(Some(sensitivity_x)),Ok(Some(sensitivity_y)))=>Sensitivity::Exactly {
+				x:sensitivity_x,
+				y:sensitivity_y
+			},
+			(Ok(Some(sensitivity_x)),Ok(None))=>Sensitivity::DeriveY{
+				x:sensitivity_x,
+				y:Ratio{
+					ratio:if let Ok(Some(sensitivity_mul_x_to_y))=cfg.getfloat("camera","sensitivity_mul_x_to_y"){sensitivity_mul_x_to_y}else{1.0}
+				}
+			},
+			(Ok(None),Ok(Some(sensitivity_y)))=>Sensitivity::DeriveX{
+				x:Ratio{
+					ratio:if let Ok(Some(sensitivity_mul_y_to_x))=cfg.getfloat("camera","sensitivity_mul_y_to_x"){sensitivity_mul_y_to_x}else{1.0}
+				},
+				y:sensitivity_y,
+			},
+			_=>{
+				Sensitivity::default()
+			},
+		};
+		UserSettings{
+			fov,
+			sensitivity,
 		}
+	}else{
+		UserSettings::default()
 	}
 }