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al - Audio Library Functions
gDP - DP GBI Macros
gdSP - General GBI Macros
gSP - SP GBI Macros
gt - Turbo Microcode RDP
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fogworld
README_DEMOS CONTENTS:
Shows how to use fog and volume culling.
README CONTENTS:
n/a
DESCRIPTION:
You will appear in a first-person perspective floating
over a 3D landscape that consists of a variety of hill
sizes and shapes. There is a solid light blue background
used to simulate the sky.
CONTROLLER FUNCTIONS:
Press the A Button for Help:
Demonstration of fog and culling.
Use Joystick to steer around.
Use these buttons:
R Stop
E accelerate
D decelerate
Start Reset position and speed
L Turn menu on/off
+ Up choose previous menu item
+ Down choose next menu item
+ Left Decrement menu item value
+ Right Increment menu item value
Additional help is available in the Help Menu.
L Button: Menu Option "Main Menu"
Help Menu
Fog Mode: On/Off
Fog Menu
Viewing Menu
Help Menu:
Main Menu
Overview
Fog Help
Cull Help
Other Help
Misc Help
Fog Menu:
Main Menu
min: 0-1000
max: 0-1000
Red: 0-255
Green: 0-255
Blue: 0-255
Viewing Menu:
Main Menu
Near Clipping: On/Off
Field of View: 1.00-120.00
Near Plane: 1-1000
Far Plane 20-10000
Dump RSP: -rspsim +parse ? crash
Dump RDP: ? crash
Multiple geometry: On/Off
bumper: 1-500
bumper2: 1-500
minalt: 1-500
Wireframe: On/Off
L Button: Menu Option "Help Menu"
Help Menu:
Main Menu
Overview
Fog Help
Cull Help
Other Help
Misc Help
Overview:
This demo illustrates the use of Fog and Culling. Fog can
be used (as in this demo) to hide distant sections of a
visual database as they come into view and disappear from
view. See FOG HELP for info on using fog. Volume Culling
is used to quickly eliminate sections of the visual database
which are out of view. See CULL HELP for information on
Volume Culling. Turn fog on and off to see it's visual.
Fog Help:
Turn fog on and off in the main menu. The color of the fog
(which is also the color of the background) can be adjusted
in the Fog Menu, as can the min and max values. The max
value indicates where the fog will completely obscure
everything. It ranges from 0 (= at the near plane) to
1000 (=at the far plane). The min value has the same range
and indicates where the fog will begin to appear. The min
and max values are nonlinear, so some tweaking may be
necessary to get the desired results. See the gSPFogPosition
man page for info.
Cull Help:
Volume culling is a way to improve performance without
using CPU power. The display list sent to the RSP
includes a qSPVertex command describing the volume
of the geometry which the display list is about to draw.
Then, the gSPCullDisplayList command skips drawing that
geometry if the bounding volume is outside the view.
Volume culling uses the RSP to decide what to cull so
the CPU doesn't have to spend so much time on that task.
See the gSPCullDisplayList man for info.
Other Help:
The Viewing Menu has a number of modes you can adjust
plus a way of dumping the display list. To dump the
display list which gets sent to the RSP, select DUMP
RSP and press the + Right button. Use DUMP RDP to
see what gets sent to the RDP. Text is not included
in the dump. This program draws 9 copies of the
terrain: the copy the eye is over, and the copies
all around that one. To simplify a dump, you can
turn MULTIPLE GEOMETRY off and only 1 copy will be
drawn. Bumper and Minalt are for collision detection
Misc Help:
The indicators at the bottom of the screen show you:
fr - frame rate (notice how much faster it is with the menu turned off).
a,d - altitude and direction.
p,s - position and speed.
Another feature is Wireframe. In the Viewing Menu,
choose Wireframe to see the geometry of the terrain
with the line microcode. This is implemented by
simply using the regular (triangle) display list
with the line microcode.
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Nintendo® Confidential
Warning: all information in this document is confidential and covered by a non-disclosure agreement. You are responsible for keeping this information confidential and protected. Nintendo will vigorously enforce this responsibility.
Copyright © 1998
Nintendo of America Inc. All rights reserved Nintendo and N64 are registered trademarks of Nintendo
Last updated January 1998
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