From 1802977b95d29198f27535b1b731d1180c083667 Mon Sep 17 00:00:00 2001
From: Aleks Kissinger <aleks0@gmail.com>
Date: Wed, 11 Jan 2017 16:33:00 +0100
Subject: made new subdir

---
 tikzit-1/src/common/Transformer.h | 154 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 tikzit-1/src/common/Transformer.h

(limited to 'tikzit-1/src/common/Transformer.h')

diff --git a/tikzit-1/src/common/Transformer.h b/tikzit-1/src/common/Transformer.h
new file mode 100644
index 0000000..1b0108a
--- /dev/null
+++ b/tikzit-1/src/common/Transformer.h
@@ -0,0 +1,154 @@
+//
+//  Transformer.h
+//  TikZiT
+//  
+//  Copyright 2010 Aleks Kissinger. All rights reserved.
+//  
+//  
+//  This file is part of TikZiT.
+//  
+//  TikZiT is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//  
+//  TikZiT is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//  
+//  You should have received a copy of the GNU General Public License
+//  along with TikZiT.  If not, see <http://www.gnu.org/licenses/>.
+//  
+
+
+#import <Foundation/Foundation.h>
+
+extern float const PIXELS_PER_UNIT;
+
+/*!
+ @class      Transformer
+ @brief      Do affine coordinate transforms between an abstract co-ordinate
+             space (such as the graph's) and the screen's.
+
+	     This currently allows zooming and panning.
+ */
+@interface Transformer : NSObject <NSCopying> {
+	NSPoint origin;
+	float x_scale;
+    float y_scale;
+}
+
+/*!
+ @brief      The screen co-ordinate of the abstract space origin.
+ */
+@property (assign) NSPoint origin;
+
+/*!
+ @brief      The scale (from abstract space to screen space)
+ @detail     This is the size of a single unit (a distance of 1.0)
+             of the abstract space on the screen.
+
+             Around 50 is a reasonable value.
+ */
+@property (assign) float scale;
+
+/*!
+ @brief      Whether co-ordinates are flipped about the X axis
+ @detail     TikZ considers X co-ordinates to run left to right,
+             which is not necessarily how the screen views
+             them.
+ */
+@property (assign,getter=isFlippedAboutXAxis) BOOL flippedAboutXAxis;
+
+/*!
+ @brief      Whether co-ordinates are flipped about the Y axis
+ @detail     TikZ considers Y co-ordinates to run up the page,
+             which is not necessarily how the screen views
+             them.
+ */
+@property (assign,getter=isFlippedAboutYAxis) BOOL flippedAboutYAxis;
+
+/*!
+ @brief      Transform a point from screen space to abstract space.
+ @param      p a point in screen space.
+ @result     A point in abstract space.
+ */
+- (NSPoint)fromScreen:(NSPoint)p;
+
+/*!
+ @brief      Transform a point from abstract space to screen space.
+ @param      p a point in abstract space.
+ @result     A point in screen space.
+ */
+- (NSPoint)toScreen:(NSPoint)p;
+
+/*!
+ @brief      Scale a distance from screen space to abstract space.
+ @param      dist a distance in screen space.
+ @result     A distance in abstract space.
+ */
+- (float)scaleFromScreen:(float)dist;
+
+/*!
+ @brief      Scale a distance from abstract space to screen space.
+ @param      dist a distance in abstract space.
+ @result     A distance in screen space.
+ */
+- (float)scaleToScreen:(float)dist;
+
+/*!
+ @brief      Scale a rectangle from screen space to abstract space.
+ @param      r a rectangle in screen space.
+ @result     A rectangle in abstract space.
+ */
+- (NSRect)rectFromScreen:(NSRect)r;
+
+/*!
+ @brief      Scale a rectangle from abstract space to screen space.
+ @param      r a rectangle in abstract space.
+ @result     A rectangle in screen space.
+ */
+- (NSRect)rectToScreen:(NSRect)r;
+
+/*!
+ @brief      Factory method to get an identity transformer.
+ @result     A transformer.
+ */
++ (Transformer*)transformer;
+
+/*!
+ @brief      Factory method to get a transformer identical to another
+ @result     A transformer.
+ */
++ (Transformer*)transformerWithTransformer:(Transformer*)t;
+
+/*!
+ @brief       Factory method to get a transformer.
+ @param o     The screen co-ordinate of the abstract space origin
+ @param scale The scale (from abstract space to screen space)
+ @result      A transformer.
+ */
++ (Transformer*)transformerWithOrigin:(NSPoint)o andScale:(float)scale;
+
+/*!
+ @brief      Get a global 'actual size' transformer.
+ @result     A transformer.
+ */
++ (Transformer*)defaultTransformer;
+
+/*!
+ @brief       A transformer set up from two bounding rects.
+
+              graphRect is made as large as possible while still fitting into screenRect.
+ @result      A transformer.
+ */
++ (Transformer*)transformerToFit:(NSRect)graphRect intoScreenRect:(NSRect)screenRect flippedAboutXAxis:(BOOL)flipX flippedAboutYAxis:(BOOL)flipY;
+
++ (Transformer*)transformerToFit:(NSRect)graphRect intoScreenRect:(NSRect)screenRect flippedAboutXAxis:(BOOL)flipX;
++ (Transformer*)transformerToFit:(NSRect)graphRect intoScreenRect:(NSRect)screenRect flippedAboutYAxis:(BOOL)flipY;
++ (Transformer*)transformerToFit:(NSRect)graphRect intoScreenRect:(NSRect)screenRect;
+
+@end
+
+// vi:ft=objc:noet:ts=4:sts=4:sw=4
-- 
cgit v1.2.3