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1.1 root 1: Sample: Demonstrating GDI and USER API Functions in Fractals
2:
3: Summary:
4:
5: The MANDEL sample demonstrates the Win32 GDI and USER API
6: functions in the setting of fractals.
7:
8: More Information:
9:
10: The Mandelbrot Dream provides the following functions:
11:
12: Drawing the Mandelbrot set and the corresponding julia
13: set
14: Zooming into any of the set
15: MDI fractal drawing windows
16: Floating Point Math/Fix Point Math
17: Shifting color table entries
18: Changing palette entries and animating palatte aka color
19: cycling
20: Loading/Saving bitmap created with special effect
21: Changing bitmap color with flood fill
22: Boundary tracing and creating a clip region out of it for
23: creating special effect
24: Enumerate printers for printing
25:
26:
27: Drawing the Mandelbrot Set and the Corresponding Julia Set
28:
29: 1.To draw the Mandelbrot set, choose the Mandelbrot Set
30: menu item from the Create menu to create a MDI child
31: window to draw the set in if one has not already been
32: created.
33:
34: 2.Then, choose either "use Fix Point math" or "use Floating
35: Point math" from the Draw menu to decide if floating
36: point or fixed point math is desired for calculation.
37: Fix Point is faster, however you lose resolution sooner
38: as you zoom in.
39:
40: 3.Also, choose the number of iterations from the Iteration
41: menu item and choose Step from the Draw menu. The higher
42: the number of iterations, the more detail is the picture
43: but the slower to generate the picture. The step
44: determines whether every scan line is drawn. The more
45: scan lines it has, the better the picture but the slower
46: to generate the picture.
47:
48: 4.To start drawing, choose Draw Set from the Draw menu.
49:
50: 5.To draw the Julia set, use the right mouse button to
51: select a point in the Mandelbrot set (the drawing surface
52: of the Mandlebrot window). A new Julia MDI window will be
53: created. Then choose Draw Set from the Draw menu to
54: start drawing.
55:
56: 6.The point selected with the right mouse button determines
57: the complex constant to use for the Julia Set.
58:
59: Zooming Into Any of the Set
60:
61: 1.To zoom in, click, drag and release with the left mouse
62: button to describe the zoom in region.
63:
64: A new MDI child of the same type as the parent
65: (Mandelbrot window or Julia window) will be created.
66:
67: 2.Choose Draw Set from the Draw menu to start drawing.
68:
69: MDI Fractal Drawing Windows
70:
71: Choose either Mandelbrot Set or Julia Set from the Create
72: menu for creating a new MDI window for drawing.
73:
74: Or, use the left mouse button to describe a zoom in
75: region in either a mandelbrot or Julia MDI window for
76: creating a new MDI window for drawing.
77:
78: Or, click on the Mandelbrot window with the right mouse
79: button for creating a Julia MDI window corresponding to
80: the mouse click position in the Mandelbrot window.
81:
82: Floating Point Math/Fix Point Math
83:
84: Choose the appropriate menu item ("Floating Point math"
85: or "Fix Point math") from the Draw menu. The Fix Point
86: math uses 20.11 fixed point integer arithmetic for
87: calculation.
88:
89: Shifting Color Table Entries
90:
91: Choose Shift from the Color menu or hit F10 to shift the
92: color table entry. The picture of the active MDI window
93: will be updated.
94:
95: Changing Palette Entries and Animating Palatte (aka Color
96: Cycling)
97:
98: Choose Cycle from the Color menu or hit F11 to start
99: color cycling the picture.
100:
101: The menu item will be grayed if the display device does
102: not support palette management. Currently, only the MIPs
103: display driver supports that.
104:
105: Loading/Saving Bitmaps Created With Special Effect
106:
107: Choose Load Bitmap from the Bitmap menu to load a bitmap
108: into the active child window. Or, choose Save Bitmap As
109: to save the picture in the active MDI child window.
110:
111: Changing Bitmap Color With Floodfill
112:
113: Choose Custom from the Color menu to select a color.
114: Then the cursor will be changed to a paint can over the
115: active child window. Click with the left mouse button on
116: the picture, the old color under the cursor will be
117: changed to the new color.
118:
119: Boundary Tracing and Creating a Clip Region Out of it For
120: Creating Special Effect
121:
122: From any active Mandelbrot window, choose Set Mandelbrot
123: Clip region from the Region menu. The boundary of the
124: escape region will be traced. The region will then be
125: selected as a clip region.
126:
127: Thus, if you load a bitmap for display, the bitmap will
128: only show through the clip region. The new picture can
129: then be saved.
130:
131: To remove the clip region, choose Remove Clip Region from
132: the Region menu.
133:
134: Note, the boundary tracing algorithm may trace out a
135: small island of only several pixels and stop. If that
136: happens, you might change the size of the window or
137: create another zoom window and trace again.
138:
139: Enumerate printers for printing
140:
141: On start up, the Mandelbrot Dream will enumerate the
142: printers and insert the printers into the Print menu.
143: Then selecting the printer on the Print menu will print
144: the picture in the active MDI window.
145:
146:
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