Title: Terrain Generator Latest Version: 1.2.5 Author: António Ramires Fernandes Downloads: Win32 exe: tgwin.zip (89K) Sources (win32 and linux) : tgsource.zip (30K) Example TGA images: tgimages.zip (122K)

Note: you may need to edit the makefile in Linux to set the paths for your system.

Features:

Version 1.2.5:

Terrain smoothing with matrix filters

Version 1.2:

Particle deposition algorithm for terrain generation

Terrain smoothing

simple water plane

Version 1.1:

Added the mid point displacement algorithm for terrain generation

Version 1.0:

Algorithms for terrain generation: Fault and Circles

GLUI interface.

Full control over the parameters.

Two navigation modes: Examine and Fly.

OpenGL window grabber.

Save the height map as a TGA image.

Load a TGA image (non-compressed, and no index colors) and build the height map.

Very Short Users Manual (for more information see the Terrain Tutorial):

Terrain Module: Image: input the file name of a non-compressed RGB(A) or Greyscale TGA image. A height map will be built using the image data. Generate: takes a width and height and generates a flat terrain Surface Type: Choose between Triangles and Quads. Surface Mode: Wireframe or Solid Surface Lighting: OpenGL, Simulated, or Off Surface Normals: if checked normals will be generated for the height map Scale Heights: set the minimum and maximum height for the surface. Scale Heights Apply: Apply the height scale. Scale Heights Reset: Set the minimum height to 0 and the maximum height to 20 Show water plane: shows a blue horizontal plane. Height: set the height of the water plane Screen Shot: Grabs the OpenGL and saves it as a TGA image. Filenames are given sequentially, 3dtechscreenxxx, where xxx starts at 0. Save as TGA: Convert the height field to a TGA image

Iterate

Function: select the function for terrain generation

Random Seed: random seeds only take effect when a new terrain is generated

Max. Disp: Selects the maximum displacement, i.e. the displacement for the first iteration

Min. Disp: Select the mimimum displacement

Interval: The displacement will decrease from max disp to min disp over a number of iterations, this field specifies that number of iterations. After the number of iterations is reached the displacement will be equal to the minimum displacement

Wave Size: Only valid for Fault-Sine and Fault-Cosine. It is the amplitude of the function. The larger the smoother the terrain.

Circle Size: Only valid for the circles algorithm. It is the radius of the circle

Sticking Particles: sets the particle mode. If checked the particles will stick where they are deposited, otherwise they will roll to form a smoother surface

Add. iterations: input here a number of iterations to add to the current total

it done: displays the number of iterations to date

Show: if checked it will show every iteration, otherwise you'll only see the results in the end.

Start: adds the number of iterations in "Add. iterations" to the total counter and starts iterating

Stop: stops the terrain generation

Roughness: determines the general look of the terrain, 1 is the default value. Higher values create rougher terrains.

Steps: The number of steps for the midpoint displacement algorithm. This determines the size of the terrain, so if the step is n, the terrain will be 2^n+1. For instance for n = 7, will end up with a terrain 129x129.

Roughness: sets the roughness of the surface for the midpoint displacement algorithm. Use higher values for rougher surfaces, smaller values will provide a smoother terrain

Steps: the number of iterations for the midpoint displacement algorithm. The terrain will be a square with ((2^n)+1) x ((2^n)+1), where n is the number of steps.

k: smoothing constant. Varies between 0 and 1. Higher values provide smoother surfaces.

Show Filter Options: Opens the Filter Options window

Navigation:

Examine: Use the GLUI controls

Fly: arrows move and rotate the camera, the mouse (button pressed) also changes the orientation. (note: if the mouse button is pressed and you press either up or down you'll move much faster than without the mouse button pressed)

Filter Options:

Filter: Select one of the predefined filters

Go For It!: Apply the filter defined in the matrix

Close Me: Close this window

The entries in the Matrix panel show the filter to apply. You can edit these values to create your own filters.