| |
Direct3D (DirectX 9.0)
Code Samples - Page 10
 |
 |
 |
 |
|
High Dynamic Range
Texture Loader |
|
This sample demonstrates how to load a .hdr or "light
probe" image file (High Dynamic Range) as a Direct3D texture.
The sample also demonstrates how to use a vertex and
pixel shader to perform tone-mapping on the fragment colors
generated by the HDR texture, so they can they can be
rendered on low-dynamic display devices like CRTs and LCD
panels.
Relevant Keywords: D3DXCreateEffectFromFile, SetTechnique, SetTexture,
SetFloat, Begin, End, BeginPass, EndPass, RGBE_ReadHeader,
RGBE_ReadPixels_RLE, rgbe_header_info, D3DXCreateTexture,
LockRect, UnlockRect, float4x4, texture,
sampler_state, technique, pass, compile, ps_2_0, tex2D, LPD3DXEFFECT,
D3DLOCKED_RECT, LPD3DXBUFFER, and D3DFMT_A16B16G16R16F.
|
|
 |
 |
 |
 |
|
|
|
|
|
|
|
Solid Node BSP
Tree Compiler |
|
One method of speeding up a game engine is to use a BSP-Tree
(Binary-Space Partitioning Tree) to subdivide and sort
your game's world geometry.
This is done by dividing up, sorting, and storing polys
in a BSP Tree in a such as way as to denote their relationship
to one another (i.e. being in front of or in back of another
poly). Once the BSP tree is compiled or built, the engine
can quickly decide whether or not it should render certain
polys based on the view’s current location within the world.
For example, the BSP compiler in this sample demonstrates
how early game programmers, who didn't have hardware accelerated
z-buffers, used a simple solid-node style BSP tree to sort
their scene polys into a back-to-front order for proper
rendering. The sample also demonstrates how a BSP Tree
can be used for collision detection by identifying whether
or not a unobstructed line-of sight can be established
between two 3D points.
Unfortunately, the code doesn't go into a lot of BSP Tree
theory or teach the basics, so if you're new to the concept
of a BSP Tree, check out this cool little Java
Applet for a real-time demonstration of how they work.
This sample is based on one of the BSP demos that came
with the "Advanced
3D BSP, PVS and CSG Techniques" course offered
at GameInstitute.com.
If you're truly interested in learning about BSP trees
and how they're used in games, this course is the best
by far and I highly recommend it.
Check out the OpenGL source
code page for the OpenGL equivalent of this sample.
Relevant Keywords: CreateDevice, SetSamplerState, SetDataFormat,
GUID_SysMouse, SetCooperativeLevel, Acquire, Unacquire,
GetDeviceState, DrawIndexedPrimitiveUP, D3DXVec3Dot,
DISCL_NONEXCLUSIVE, DISCL_FOREGROUND, LPDIRECTINPUT8,
LPDIRECTINPUTDEVICE8, D3DXVECTOR3, DIERR_INPUTLOST, DIMOUSESTATE2,
D3DSAMP_MIPMAPLODBIAS, D3DSAMP_MAGFILTER, D3DSAMP_MINFILTER,
D3DSAMP_MIPFILTER, D3DTEXF_LINEAR, D3DFMT_INDEX16 and
DIRECTINPUT_VERSION.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Simple Introduction to
the NovodeX Physics SDK |
|
This sample demonstrates how to use the
NovodeX Physics SDK by
simply creating and dropping boxes on to a plane that
represents the ground. Check out the OpenGL source
code page for the OpenGL equivalent of this sample.
Relevant Keywords: NxPhysicsSDK, NxScene, NxVec3,
ErrorStream, NxCreatePhysicsSDK, setMaterialAtIndex,
createScene, shapes.pushBack, createActor,
NX_BROADPHASE_COHERENT, release, releaseScene, NxBodyDesc,
NxBoxShapeDesc, NxActorDesc, createActor, userData,
getNbActors, getActors, getGlobalPose, getColumnMajor44,
flushStream, and fetchResults.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
How to
use the Tokamak SDK to Create
a Rope or Chain using Ball-Joints |
|
This sample demonstrates how to use the Tokamak
Physics SDK to create a chain or rope like object
by using small collision cubes joined by ball-joints.
For demonstration purposes, the chain is dropped onto
a platform, which doesn’t quite catch all of it. This
allows the chain to hang off and swing about. For fun,
you can use the F1 key to lift up on the chain's last
segment by applying some velocity to it. Check out the OpenGL source
code page for the OpenGL equivalent of this sample.
Relevant Keywords: neSimulator, neRigidBody,
neAnimatedBody, neSimulatorSizeInfo, neBoxInertiaTensor, neJoint,
neGeometry, CreateSimulator, CreateRigidBody, AddGeometry,
SetBoxSize, CollideConnected, UpdateBoundingInfo, SetInertiaTensor,
SetMass, SetJointFrameWorld, SetType, SetEpsilon, SetIteration,
Enable, and GetTransform.
|
|
|
|
|
|
|
|
|
