hardware, and a powerful API that was being hyped by one of the most
influential software giants in the world.
The most apparent removal in Direct3D 10 was the fixed-function pipeline,
which is essentially a set of rendering states and algorithms built into the API
that allowed for the rendering of objects using common effects. The fixed-
function pipeline was removed in favor of programmable shaders within
graphics hardware. Graphics shaders, which will be discussed throughout this
book, are code written specifically to customize how the graphics hardware
processes geometry. Graphics shaders were first introduced in DirectX 8, but
since then graphics hardware and the Shader Models that they run have evolved
to a point where they have become the star of the API.
In Direct3D 9 we can render geometry, enable lighting by setting a few
properties and rendering states, have the API transform our geometry, and so
forth by calling a few Direct3D function calls. In Direct3D 10 we can do all of
that ourselves and much more in shaders. The key thing for beginners to keep in
mind if this is their first time learning graphics programming is that the fixed-
function pipeline was limited to whatever was built into the API, whereas
shaders allow us to create any effect, limited only by the frame-rate we deem
desirable in our games . Want lighting? Call a Direct3D function to enable it and
set its properties (up to eight lights). Want to render surfaces with more than
one image? Just enable it. If, however, you wish to perform pixel-based motion
blur and depth-of-field, you are out of luck using the fixed-function pipeline.
Often if the fixed-function pipeline does not explicitly support it and you are not
using shaders, you cannot create the effect you want. Although some coders
have found tricks and workarounds to getting some effects created without
shaders, it was often a very difficult and inefficient workaround. I remember
these times well and do not miss them.
Today, if we want to perform bump mapping, we can write a pixel shader that
takes the light direction, performs a calculation using it and the pixel-level
surface direction loaded from a special image known as a normal map, and
combine that with the shading of the final pixel’s color. In the days before
shaders, or even when shaders were limited in the features they provided (such
as the dark ages of register combiners for early versions of OpenGL), this was
impossible, and doing even simple effects like normal mapping back then was
What Is DirectX? 3
剩余384页未读，继续阅读
佳明是个坏先生
- 粉丝: 0
- 资源: 1
我的内容管理
展开
最新资源
- 多模态联合稀疏表示在视频目标跟踪中的应用
- Kubernetes资源管控与Gardener开源软件实践解析
- MPI集群监控与负载平衡策略
- 自动化PHP安全漏洞检测：静态代码分析与数据流方法
- 青苔数据CEO程永：技术生态与阿里云开放创新
- 制造业转型： HyperX引领企业上云策略
- 赵维五分享：航空工业电子采购上云实战与运维策略
- 单片机控制的LED点阵显示屏设计及其实现
- 驻云科技李俊涛：AI驱动的云上服务新趋势与挑战
- 6LoWPAN物联网边界路由器：设计与实现
- 猩便利工程师仲小玉：Terraform云资源管理最佳实践与团队协作
- 类差分度改进的互信息特征选择提升文本分类性能
- VERITAS与阿里云合作的混合云转型与数据保护方案
- 云制造中的生产线仿真模型设计与虚拟化研究
- 汪洋在PostgresChina2018分享：高可用 PostgreSQL 工具与架构设计
- 2018 PostgresChina大会：阿里云时空引擎Ganos在PostgreSQL中的创新应用与多模型存储
资源上传下载、课程学习等过程中有任何疑问或建议，欢迎提出宝贵意见哦~我们会及时处理！
点击此处反馈
