surf cookbook

In the previous blog feature point detection learning _1 (SIFT algorithm), the classical SIFT algorithm is introduced briefly, the SIFT algorithm is stable, the detected feature points are also more, the biggest determination is the high computational complexity. There are many scholars to improve it, in which the more famous is the surf algorithm introduced in this paper, the Chinese meaning of surf is fas

If you ' ve had a chance to play around with OpenCV 3 (and does a lot of work with KeyPoint If you ' ve had a chance to play around with OpenCV 3 (and does a lot of work with KeyPoint detectors and feature) You may have noticed the SIFT and SURF implementations are no longer included in the OpenCV 3 library by default. Unfortunately, you probably learned this lesson the hard way by opening up a terminal, importing OpenCV, and the

Alpha to 0.5}endcg//the Ztest greater is set above, only the areas that are obscured are rendered. So the next place to render the area without occlusion. Zwrite onztest lequal//greater/gequal/less/lequal/equal/notequal/always/never/off default is LEqual if you want to draw the Z-value of the pixel The small remainder equals the value in the depth buffer, then replaces it with the new pixel color value. Cgprogram#pragma Surface Surf lambertsampler2d

selected according to requirements.struct Appdata_base { float4 vertex:position; FLOAT3 Normal:normal; Float4 texcoord:texcoord0;}; struct Appdata_tan { float4 vertex:position; FLOAT4 tangent:tangent; FLOAT3 Normal:normal; Float4 texcoord:texcoord0;};3. Use the vertex color as the output in the surf () function.void Surf (Input in, InOut surfaceoutput o) {o.albedo=in.vertexcolor;}Full

:_cutoff is specified in the #pragma statement#pragma surface surf Lambert alphatest:_cutoffWhen Alphatest:_cutoff is specified, our shader becomes a transparent clipping shader. When the Alpha value of the fragment 2. Assign the channel value to O.alphaO.alpha = C.R;According to the above, I thought the workflow was like this.Float _cutoff=0.5o. Alpha = texture. Rif (O.alpha But looking at unity-generated shader code discovery is using the Clip () fu

The fourth chapter reflects the end of the reflection, then continue to study the fifth-light model.We are already familiar with the illumination model, before the various diffuse and specular highlights have been customized to the Illumination model function. I thought this chapter would be about the light model function that I said earlier, but it's not.After reading the first section, the feeling is that it's like teaching me how to use the baked pictures. That means how to use a static pictu

, one far away.Transfer from Http://blog.csdn.net/huutu http://www.thisisgame.com.cnFirst look at the default displayCreate a new Material, create a new Shader, and follow the steps below to modify the default Shader.1, in the Tags module to declare the object's render queue, the default object is Geometry, now want to let near a point of the object to render first, then let the render queue reduced, here set to Geometry-20Tags {"Rendertype" = "Opaque" "Queue" = "Geometry-20"}2. Add the Zwrite O

Surf (Input in, InOut surfaceoutput o) {half4 c = tex2d (_maintex, In.uv_maintex); O. Albedo = C.rgb;o. Alpha = C.A;} ENDCG} FallBack "Diffuse"}The book also adds a mix of colors to make the effect look more dazzling, not here.Transfer from Http://blog.csdn.net/huutu http://www.thisisgame.com.cnLearn about a function mentioned in the book LerpLerp interpolation functionfloat f = lerp (from,to,t) = from* (1-t) + to*tWhen t = 0 returns from, when t = 1

the corresponding variable for subshader usesampler2d _maintex;float4 _maintint;float4 _specularcolor;float _specular;float _SpecularPower;sampler2D _ Anisodir;float _anisooffset;The _anisodir is left to the normal map.Because the data of the normal map needs to be read, the INPUT structure is modified, and the UV variables of the normal map are added.struct Input {float2 uv_maintex;float2 uv_anisodir;};The default surfaceoutput in Unity does not meet the needs of our shader, so we need to cus

One of the most common scenarios for using vertex information is to create a more realistic terrain or environment that is blended into different textures by using an RGBA channel that uses vertex colors. This way, you don't have to import a map as a mixed map.Create a new scene and import a flat mesh model with the book.New material, new shader. Select shader in the material and assign the material to the model.The shader code is as follows:Shader "Cookbookshaders/chapt7-3/vertexheightmapblend"

Tint", Color) = (1,1,1,1) _ Maintex ("Base (RGB)", 2D) = "White" {}_cubemap ("Cubemap", CUBE) = "" "{}_reflectionamount (" Reflection Amount ", Range (0,1)) =1_rimpower ("Fresnel Falloff", Range (0.1,3)) =2_speccolor ("Specular Color", Color) = (1,1,1,1) _specpower ("Specular Power ", Range (0,1)) =0.5}subshader {Tags {" rendertype "=" Opaque "}lod 200cgprogram#pragma surface Surf Blinnphong#pragma Target 3.0FLOAT4 _maintint;sampler2d _maintex;sample

, such as recording 4 images of the alpha, such as the height of the calculation of the terrain, altitude is recorded as 1, elevation must not recorded as 0.struct Input {float2 uv_ SHITOU_TEXTURE;FLOAT2 uv_cao_texture;float2 uv_shazi_texture;float2 uv_niba_texture;float2 uv_BlendTexture;}; void Surf (Input in, InOut surfaceoutput o) {float4 blenddata=tex2d (_blendtexture,in.uv_blendtexture);// Read all the mixed data from the grayscale graph recordin

IntroductionVue Cookbook vs. WizardsWhat is the difference between Vue's cookbook and the wizard? Why do you have to cookbook if you have a guide?1. A more exclusive explanation, in the wizard, we are actually telling a story, each part of the construction and presentation is derived from the previous module. But in cookbook