HoloDraw Examples

Triangle

A triangle drawn with three colored lines.

Arrow

A simple, flat, solid polygon.

Line in a box

A straight, diagonal line in a bounding box.

Solid triangle in a box

A simple filled triangle in a bounding box.

Streams merging into a river

This diagram illustrates the concept that as smaller streams join into a river, the amount of water carried by the river will be the sum of the tributaries.

You can use HoloDraw to make most any precision drawing, when you need to place lines at some exact location, or angle, or distance from each other. Using a mouse-driven drawing program, your sketch is only as accurate as your mouse movements, but with HoloDraw, you can specify the exact coordinates of every point.

Also, the script that created this image gives an example of using the Unix "grep" command to add a single viewpoint to your VRML file.

X Y Z coordinate cube

HoloDraw and VRML use this X-Y-Z coordinate system to specify the location of objects in 3D space.

Red Green Blue color cube

HoloDraw and VRML use this Red-Green-Blue system for designating colors. This will help you see how the various color values are interpreted and rendered by your browser and monitor. Rotate the cube to see how lighting effects work. Click down to one of the .GIF or .JPG images to see how well colors are (or are not) preserved in those formats. Print an image to see how the colors will appear on your printer.

Graph paper

I needed some graph paper to plan another HoloDraw project. Why buy paper when I can use HoloDraw to make my own? But this also illustrates how you could plot a grid in your drawing using long negative tickmarks.

Negative tickmarks go inside the bounding box instead of around the outside as usual. Also, the length is set so that they go all the way across the entire image.

This is a 2D drawing; it doesn't make much sense to rotate it. You can use HoloDraw to make 2D plots too -- it doesn't have to be 3D.

Captions

Expanding on the graph paper example, this shows how you can plot captions at any location, size and color within your drawing.

Floor plan for an atrium

Two walls and a floor to help evaluate a proposed remodeling project.

Floor plan showing house and yard

Another example of using HoloDraw to make a 2D plot. Most 3D viewing software will let you move around the image and zoom in on a particular area. So you could print a detailed floor plan for one room and an overall floor plan of the entire area both from one source drawing.

Use HoloDraw any time you don't want to have to repeat the same drawing in several different sizes, scales, levels of detail, or subsets of the whole area. Create your image just once, and let your VRML browser zoom the image to whatever views you want.

Surface plot of a function

This 3D graph plots the output of a compensation formula, in which a salesperson is paid some combination of commission, hourly wage and overtime.

Annotated sphere

A line drawing of a sphere, annotated with coordinates. Detailed tutorial - check it out!

Diagram of Earth and its moon

This true-scale sketch of the Earth and its moon shows how to plot two spheres in the same drawing. Each sphere has its own local 360-degree coordinate system while the overall drawing has an X-Y-Z Cartesian coordinate system, as demonstrated by the bounding box.

The HoloDraw logo

Wrap text and lines onto the surface of a partial globe, with a spherical bounding box.