Differences
This shows you the differences between two versions of the page.
|
mgl:functionreferencetext [2009/06/10 18:21] |
mgl:functionreferencetext [2022/08/30 13:40] (current) |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| + | ====== Drawing text ====== | ||
| + | |||
| + | ===== mglTextSet: Set parameters for drawing text ===== | ||
| + | |||
| + | **purpose:** Set text properties for mglText\\ | ||
| + | **usage:** mglTextSet(fontName,<fontSize>,<fontColor>,<fontVFlip>,<fontHFlip>,<fontRotation>,<fontBold>,<fontItalic>,<fontUnderline>,<fontStrikeThrough>) | ||
| + | |||
| + | ^ argument ^ value ^ | ||
| + | | fontName | 'fontName' (defaults to 'Times Roman') | | ||
| + | | fontSize | font point size (defaults to 36) | | ||
| + | | fontColor | [r g b] where r, g and b are values between 0 and 1 (defaults to [1 1 1]) | | ||
| + | | fontVFlip | 0 = no vertical flip, 1 = vertical flip (defaults to 0) | | ||
| + | | fontHFlip | 0 = no horizontal flip, 1 = horizontal flip (defaults to 0) | | ||
| + | | fontRotation | rotation in degrees (defaults to 0) | | ||
| + | | fontBold | 0 for normal, 1 for **bold** (defaults to 0) | | ||
| + | | fontItalic | 0 for normal, 1 for //italic// (defaults to 0) | | ||
| + | | fontUnderline | 0 for normal, 1 for __underline__ (defaults to 0) | | ||
| + | | fontStrikethrough | 0 for normal, 1 for strikethrough (defaults to 0) | | ||
| + | |||
| + | mglOpen; | ||
| + | mglVisualAngleCoordinates(57,[16 12]); | ||
| + | mglTextSet('Helvetica',32,[0 0.5 1 1],0,0,0,0,0,0,0); | ||
| + | mglTextDraw('Hello There',[0 0]); | ||
| + | mglFlush; | ||
| + | |||
| + | ===== mglText: Create a texture from a string ===== | ||
| + | |||
| + | **purpose:** Creates a texture from a string.\\ **usage:** tex = mglText('string') | ||
| + | |||
| + | ^ argument ^ value ^ | ||
| + | | string | The string you want to draw | | ||
| + | |||
| + | mglOpen; | ||
| + | mglVisualAngleCoordinates(57,[16 12]); | ||
| + | mglTextSet('Helvetica',32,[0 0.5 1 1],0,0,0,0,0,0,0); | ||
| + | thisText = mglText('hello') | ||
| + | mglBltTexture(thisText,[0 0],'left','top'); | ||
| + | mglFlush; | ||
| + | |||
| + | Normally you will only set one output argument which is a texture usable by mglBltTexture. But if you have two output arguments | ||
| + | |||
| + | [tex texMatrix] = mglText('hello'); | ||
| + | |||
| + | texMatrix will contain a 2D matlab array that has a rendering of the text (i.e. it will have values from 0-255 that represent the string). You can modify this matrix as you want and then use mglCreateTexture to create it into a texture that can be displayed by mglBltTexture | ||
| + | |||
| + | ===== mglTextDraw: Draws text to screen (simple but slow) ===== | ||
| + | |||
| + | **purpose:** wrapper around mglText and mglBltTexture to draw some text on the screen. If you need to draw text more quickly, you will have to pre-make the text textures with mglText and then use mglBltTexture when you want it. Otherwise, for non time-critical things this functions should be used.\\ **usage:** mglTextDraw(str,pos,<hAlignment>,<vAlignment>) | ||
| + | |||
| + | ^ argument ^ value ^ | ||
| + | | str | desired string | | ||
| + | | pos | [x y] position on screen | | ||
| + | | hAlignment | -1 = left, 0 = center, 1 = right (defaults to center) | | ||
| + | | vAlignment | -1 = top, 0 = center, 1 = bottom (defaults to center) | | ||
| + | |||
| + | mglOpen; | ||
| + | mglVisualAngleCoordinates(57,[16 12]); | ||
| + | mglTextSet('Helvetica',32,[0 0.5 1 1],0,0,0,0,0,0,0); | ||
| + | mglTextDraw('Hello There',[0 0]); | ||
| + | mglFlush; | ||
| + | |||
| + | ===== mglStrokeText: Fast no-frills line-based text drawing (does not use texture memory) ===== | ||
| + | |||
| + | **purpose:** Draws a stroked fixed-width character or string on MGL display. Default width is 1, default height 1.8 (in current screen coordinates)\\ **usage:** [x,y]=mglStrokeText( string, x, y, scalex, scaley, linewidth, color, rotation ); | ||
| + | |||
| + | ^ argument ^ value ^ | ||
| + | | string | text string. Unsupported characters are printed as # | | ||
| + | | x,y | center coordinates of first character (current screen coordinates) | | ||
| + | | scalex | scale factor in x dimension (relative to character) (current screen coordinates). Note that text can be mirrored by setting this factor to a negative value. | | ||
| + | | scaley | scale factor in y dimension (relative to character) (current screen coordinates). Optional, defaults to scalex. | | ||
| + | | linewidth | width of line used to draw text. Default 1. | | ||
| + | | color | text color. Default [1 1 1] | | ||
| + | | rotation | in radians. Default 0. | | ||
| + | | OUTPUT x,y | position after last letter (for subsequent calls) [optional] | | ||
| + | |||
| + | mglOpen; | ||
| + | mglVisualAngleCoordinates(57,[16 12]); | ||
| + | mglStrokeText('Hello',0,0); | ||
| + | mglFlush; | ||
| + | |||