3D Models (The Chickadee Game Toolkit)

From 03f0340ae9df26b40855dd78216ff47738957851 Mon Sep 17 00:00:00 2001 From: David Thompson Date: Thu, 19 Nov 2020 20:50:56 -0500 Subject: manuals: Update chickadee manual to 0.6.0. --- manuals/chickadee/3D-Models.html | 16 +- manuals/chickadee/API-Reference.html | 24 +- manuals/chickadee/Agendas.html | 28 +- manuals/chickadee/Audio-Files.html | 16 +- manuals/chickadee/Audio.html | 22 +- manuals/chickadee/Basics.html | 14 +- manuals/chickadee/Bezier-Curves.html | 20 +- manuals/chickadee/Blending.html | 14 +- manuals/chickadee/Buffers.html | 28 +- manuals/chickadee/Channels.html | 14 +- manuals/chickadee/Colors.html | 18 +- manuals/chickadee/Copying-This-Manual.html | 16 +- manuals/chickadee/Easings.html | 16 +- manuals/chickadee/Fonts.html | 46 +- manuals/chickadee/Framebuffers.html | 16 +- .../chickadee/GNU-Free-Documentation-License.html | 16 +- manuals/chickadee/Graphics.html | 42 +- manuals/chickadee/Grid.html | 18 +- manuals/chickadee/Index.html | 1082 ++++++++++---------- manuals/chickadee/Input-Devices.html | 14 +- manuals/chickadee/Installation.html | 16 +- manuals/chickadee/Kernel.html | 22 +- manuals/chickadee/Lines-and-Shapes.html | 137 --- manuals/chickadee/Live-Coding.html | 14 +- manuals/chickadee/Math.html | 32 +- manuals/chickadee/Matrices.html | 16 +- manuals/chickadee/Particles.html | 22 +- manuals/chickadee/Path-Finding.html | 16 +- manuals/chickadee/Quaternions.html | 14 +- manuals/chickadee/Rectangles.html | 16 +- manuals/chickadee/Rendering-Engine.html | 48 +- manuals/chickadee/Requirements.html | 14 +- manuals/chickadee/Scripting.html | 22 +- manuals/chickadee/Scripts.html | 28 +- manuals/chickadee/Shaders.html | 28 +- manuals/chickadee/Sources.html | 18 +- manuals/chickadee/Sprites.html | 22 +- manuals/chickadee/Textures.html | 29 +- manuals/chickadee/The-Environment.html | 14 +- manuals/chickadee/The-Game-Loop.html | 37 +- manuals/chickadee/The-Listener.html | 14 +- manuals/chickadee/Tile-Maps.html | 42 +- manuals/chickadee/Tweening.html | 16 +- manuals/chickadee/Vector-Paths.html | 339 ++++++ manuals/chickadee/Vectors.html | 16 +- manuals/chickadee/Viewports.html | 18 +- manuals/chickadee/Window-Manipulation.html | 14 +- manuals/chickadee/index.html | 33 +- 48 files changed, 1395 insertions(+), 1142 deletions(-) delete mode 100644 manuals/chickadee/Lines-and-Shapes.html create mode 100644 manuals/chickadee/Vector-Paths.html (limited to 'manuals') diff --git a/manuals/chickadee/3D-Models.html b/manuals/chickadee/3D-Models.html index 1e6d2ca..ef1a2cb 100644 --- a/manuals/chickadee/3D-Models.html +++ b/manuals/chickadee/3D-Models.html @@ -18,7 +18,7 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html. The document was typeset with http://www.texinfo.org/ (GNU Texinfo). --> - + 3D Models (The Chickadee Game Toolkit) @@ -28,12 +28,12 @@ http://www.texinfo.org/ (GNU Texinfo). - - + + - - - + + + - - - - - - - -

2.3.5 Lines and Shapes

- -

Sprites are fun, but sometimes simple, untextured lines and polygons -are desired. That’s where the (chickadee render shapes) module -comes in! -

Procedure: draw-line start end [#:thickness 0.5] [#:feather 1.0] [#:cap round] [#:color] [#:shader]: -
Draw a line segment from start to end. The line will be -thickness pixels thick with an antialiased border feather -pixels wide. The line will be colored color. cap -specifies the type of end cap that should be used to terminate the -lines, either none, butt, square, round, -triangle-in, or triangle-out. Advanced users may use -the shader argument to override the built-in line segment -shader. -

- -

Procedure: draw-bezier-curve bezier [#:segments 32] [#:control-points?] [#:tangents?] [#:control-point-size 8] [#:control-point-color yellow] [#:tangent-color yellow] [#:thickness 0.5] [#:feather 1.0] [#:matrix]

Draw the curve defined by bezier using a resolution of N -segments. When control-points? is #t, the control -points are rendered as squares of size control-point-size pixels -and a color of control-point-color. When tangents? is -#t, the tangent lines from terminal point to control point are -rendered using the color tangent-color. -

All line segments rendered use draw-line, and thus the -arguments thickness and feather have the same effect as in -that procedure. -

A custom matrix may be passed for applications that require more -control over the final output. -

- -

Procedure: draw-bezier-path path [#:segments 32] [#:control-points?] [#:tangents?] [#:control-point-size 8] [#:control-point-color yellow] [#:tangent-color yellow] [#:thickness 0.5] [#:feather 1.0] [#:matrix]: -
Render path, a list of bezier curves. See the documentation for -draw-bezier-curve for an explanation of all the keyword -arguments. -

- - - - - - diff --git a/manuals/chickadee/Live-Coding.html b/manuals/chickadee/Live-Coding.html index 167c87a..74a927c 100644 --- a/manuals/chickadee/Live-Coding.html +++ b/manuals/chickadee/Live-Coding.html @@ -18,7 +18,7 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html. The document was typeset with http://www.texinfo.org/ (GNU Texinfo). --> - + Live Coding (The Chickadee Game Toolkit) @@ -28,12 +28,12 @@ http://www.texinfo.org/ (GNU Texinfo). - - + + - - - + + + + + + + + + + +

2.3.5 Vector Paths

+ +

The (chickadee graphics path) module can be used to draw lines, +curves, circles, rectangles, and more in a scalable, resolution +independent manner. It is not an SVG compliant renderer, nor +does it intend to be. However, those familiar with SVG and/or the +HTML5 Canvas API should find lots of similarities. +

This API is considered to be experimental and may change +substantially in future releases of Chickadee. There are many missing +features such as gradient fills and dashed strokes. +

The first step to rendering vector graphics is to create a +path: A series of commands that can be thought of as moving a +pen around a piece of paper. A path can be either open or closed. A +closed path draws a straight line from the last point in the path to +the first. +

Procedure: path . commands

Return a new path that follows commands. +

(path (move-to (vec2 50.0 50.0))
+      (line-to (vec2 500.0 50.0))
+      (line-to (vec2 400.0 200.0))
+      (bezier-to (vec2 500.0 250.0) (vec2 380.0 300.0) (vec2 400.0 400.0))
+      (line-to (vec2 300.0 400.0))
+      (close-path))
+

+ +

Available drawing commands: +

Procedure: move-to point: Pick up the pen and move it to point. +

+ +

Procedure: line-to point: Draw a line from the current pen position to point. +

+ +

Procedure: bezier-to control1 control2 point: Draw a cubic bezier curve from the current pen position to +point. The shape of the curve is determined by the two control +points: control1 and control2. +

+ +

Procedure: close-path: Draw a straight line back to the first point drawn in the path. +

+ +

Procedure: arc center rx ry angle-start angle-end: Draw an elliptical arc spanning the angle range [angle-start, +angle-end], centered at center with radii rx and +ry (set both to the same value for a circular arc.) +

+ +

Included are some helpful procedures for generating common types of +paths: +

Procedure: line start end: Return a path that draws a straight line from start to end. +

+ +

Procedure: polyline . points: Return a path that draws a series of lines connecting points. +

+ +

Procedure: rectangle bottom-left width height: Return a path that draws a rectangle whose bottom-left corner is at +bottom-left and whose size is defined by width and +height. +

+ +

Procedure: square bottom-left size: Return a path draws a square whose bottom-left corner is at +bottom-left and whose size is defined by size. +

+ +

Procedure: rounded-rectangle bottom-left width height [#:radius 4.0] [#:radius-bottom-left] [#:radius-bottom-right] [#:radius-top-left] [#:radius-top-right]: +
Return a path that draws a rectangle with rounded corners whose +bottom-left corner is at bottom-left and whose size is defined +by width and height. The argument radius is used to +define the corner radius for all corners. To use a different radius +value for a corner, use radius-bottom-left, +radius-bottom-right, radius-top-left, and/or +radius-top-right. +

+ +

Procedure: regular-polygon center num-sides radius: Return a path that draws a regular polygon with num-sides sides +centered on the point center with each vertex radius units +away from the center. +

+ +

Procedure: ellipse center rx ry: Return a path that draws an ellipsed centered on the point +center with radii rx and ry. +

+ +

Procedure: circle center r: Return a path that draws a circle centered on the point center +with radius r. +

+ +

With one or more paths created, a painter is needed to give the +path its style and placement in the final picture. Painters can be +combined together to form arbitrarily complex pictures. +

Procedure: stroke . paths: Apply a stroked drawing style to paths. +

+ +

Procedure: fill . paths: Apply a filled drawing style to paths. +

+ +

Procedure: fill-and-stroke . paths: Apply a filled and stroked drawing style to paths. +

+ +

Procedure: transform matrix painter: Apply matrix, a 3x3 transformation matrix, to painter. +

+ +

Procedure: translate v painter: Translate painter by the 2D vector v. +

+ +

Procedure: rotate angle painter: Rotate painter by angle radians. +

+ +

Procedure: scale x painter: Scale painter by the scalar x. +

+ +

Procedure: pad pad-x pad-y painter: Add pad-x and pad-y amount of empty space around +painter. +

+ +

Procedure: superimpose . painters: Stack painters on top of each other. +

+ +

Procedure: beside . painters: Place painters next to each other in a row. +

+ +

Procedure: below . painters: Place painters next to each other in a column. +

+ +

Syntax: with-style ((style-name value) ...) painter

Apply all the given style settings to painter. +

Possible style attributes are: +

blend-mode +
fill-color +
stroke-color +
stroke-width +
stroke-feather +
stroke-cap +

+ +

(with-style ((stroke-color green)
+             (stroke-width 4.0))
+  (stroke (circle (vec2 100.0 100.0) 50.0)))
+

+ +

As in real life, a painter cannot paint anything without a canvas. +Once a painter has been associated with a canvas, it can finally be +rendered to the screen. +

Procedure: make-canvas painter [#:matrix]: Return a new canvas that will painter will draw on. Optionally, +a 3x3 matrix may be specified to apply an arbitrary +transformation to the resulting image. +

+ +

Procedure: make-empty-canvas [#:matrix]: Return a new canvas that no painter is using. Optionally, a 3x3 +matrix may be specified to apply an arbitrary transformation to +the image, should a painter later be associated with this canvas. +

+ +

Procedure: canvas? obj: Return #t is obj is a canvas. +

+ +

Procedure: set-canvas-painter! canvas painter: Associate painter with canvas. +

+ +

Procedure: set-canvas-matrix! canvas matrix: Set the 3x3 transformation matrix of canvas to matrix. +

+ +

Procedure: draw-canvas canvas: Render canvas to the screen. +

+ +

+ + + + + + diff --git a/manuals/chickadee/Vectors.html b/manuals/chickadee/Vectors.html index 9dff143..a6eb7ec 100644 --- a/manuals/chickadee/Vectors.html +++ b/manuals/chickadee/Vectors.html @@ -18,7 +18,7 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html. The document was typeset with http://www.texinfo.org/ (GNU Texinfo). --> - + Vectors (The Chickadee Game Toolkit) @@ -28,12 +28,12 @@ http://www.texinfo.org/ (GNU Texinfo). - - + + - - - + + +