二十二，加上各种贴图

使用pbr的各种贴图，albedo,金属度，ao,法线，粗糙度，可以更好的控制各个片元
1，先加上纹理坐标
texCoords->push_back(osg::Vec2(xSegment, ySegment));
geom->setVertexAttribArray(3, texCoords, osg::Array::BIND_PER_VERTEX);

program->addBindAttribLocation("aTexCoords", 3);
in vec2 aTexCoords;	
varying vec2 TexCoords;
TexCoords = aTexCoords;

然后加上各种贴图

"uniform sampler2D albedoMap;																	   \n"
"uniform sampler2D normalMap;																	   \n"
"uniform sampler2D metallicMap;																	   \n"
"uniform sampler2D roughnessMap;																   \n"
"uniform sampler2D aoMap;																		   \n""vec3 getNormalFromMap()																			\n"
"{																									\n"
"	vec3 tangentNormal = texture(normalMap, TexCoords).xyz * 2.0 - 1.0;								\n"
"																									\n"
"	vec3 Q1 = dFdx(WorldPos);																		\n"
"	vec3 Q2 = dFdy(WorldPos);																		\n"
"	vec2 st1 = dFdx(TexCoords);																		\n"
"	vec2 st2 = dFdy(TexCoords);																		\n"
"																									\n"
"	vec3 N = normalize(Normal);																		\n"
"	vec3 T = normalize(Q1*st2.t - Q2*st1.t);														\n"
"	vec3 B = -normalize(cross(N, T));																\n"
"	mat3 TBN = mat3(T, B, N);																		\n"
"																									\n"
"	return normalize(TBN * tangentNormal);															\n"
"}																									\n""vec3 albedo = pow(texture(albedoMap, TexCoords).rgb, vec3(2.2));								  \n""float metallic = texture(metallicMap, TexCoords).r;											  \n""float roughness = texture(roughnessMap, TexCoords).r;											  \n""float ao = texture(aoMap, TexCoords).r;														  \n""vec3 N = getNormalFromMap();		\n"osg::ref_ptr<osg::Texture2D> albedoTexture = albedoVector[row];osg::ref_ptr<osg::Texture2D> normalTexture = normalVector[row];osg::ref_ptr<osg::Texture2D> metallicTexture = metallicVector[row];osg::ref_ptr<osg::Texture2D> roughnessTexture = roughnessVector[row];osg::ref_ptr<osg::Texture2D> aoTexture = aoVector[row];osg::ref_ptr<osg::Uniform> albedoUniform = new osg::Uniform("albedoMap", 7);osg::ref_ptr<osg::Uniform> normalUniform = new osg::Uniform("normalMap", 8);osg::ref_ptr<osg::Uniform> metallicUniform = new osg::Uniform("metallicMap", 9);osg::ref_ptr<osg::Uniform> roughnessUniform = new osg::Uniform("roughnessMap", 10);osg::ref_ptr<osg::Uniform> aoUniform = new osg::Uniform("aoMap", 11);stateset->setTextureAttributeAndModes(7, albedoTexture, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(8, normalTexture, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(9, metallicTexture, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(10, roughnessTexture, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(11, aoTexture, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->addUniform(albedoUniform);stateset->addUniform(normalUniform);stateset->addUniform(metallicUniform);stateset->addUniform(roughnessUniform);stateset->addUniform(aoUniform);

其余的不变，运行结果如下
在这里插入图片描述
代码如下

//通过Liblas读取.las文件，并在osg中显示出来,用shader，先在片元着色器指定使用绿色
#include
#include

#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osgUtil/Optimizer>
#include <osg/CoordinateSystemNode>

#include <osg/Switch>
#include <osg/Types>
#include <osgText/Text>

#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>

#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/DriveManipulator>
#include <osgGA/KeySwitchMatrixManipulator>
#include <osgGA/StateSetManipulator>
#include <osgGA/AnimationPathManipulator>
#include <osgGA/TerrainManipulator>
#include <osgGA/SphericalManipulator>

#include <osgGA/Device>

#include
#include <osg/Shader>
#include <osg/BlendFunc>
#include <osg/blendColor>
#include <osg/Point>
#include <osg/Shapedrawable>
#include <osgUtil/SmoothingVisitor>

#include <osg/TextureCubeMap>

static const char * vertexShader_PBR =
{
“in vec3 aPos; \n”
“in vec3 aNormal; \n”
“in vec2 aTexCoords; \n”
“varying vec3 WorldPos; \n”
“varying vec3 Normal; \n”
“varying vec2 TexCoords; \n”
“uniform mat4 normalMatrix; \n”
“void main() \n”
“{ \n”
" WorldPos = aPos; \n"
" Normal = vec3(normalMatrix * vec4(aNormal,1.0)); \n"
" TexCoords = aTexCoords; \n"
" gl_Position = ftransform(); \n"
“}\n”
};

static const char *psShader_PBR =
{
“#version 330 core \n”
“out vec4 FragColor; \n”
“varying vec3 WorldPos; \n”
“varying vec3 Normal; \n”
“varying vec2 TexCoords; \n”
“uniform sampler2D albedoMap; \n”
“uniform sampler2D normalMap; \n”
“uniform sampler2D metallicMap; \n”
“uniform sampler2D roughnessMap; \n”
“uniform sampler2D aoMap; \n”
//IBL
“uniform samplerCube irradianceMap;”
“uniform sampler2D brdfLUT; \n”
“uniform samplerCube prefilterMap0; \n”
“uniform samplerCube prefilterMap1; \n”
“uniform samplerCube prefilterMap2; \n”
“uniform samplerCube prefilterMap3; \n”
“uniform samplerCube prefilterMap4; \n”

"uniform vec3 lightPositions[4];																  \n"
"uniform vec3 lightColors[4];																	  \n"
"uniform vec3 camPos;																			  \n"
"const float PI = 3.14159265359;																  \n"
"vec3 getNormalFromMap()																			\n"
"{																									\n"
"	vec3 tangentNormal = texture(normalMap, TexCoords).xyz * 2.0 - 1.0;								\n"
"																									\n"
"	vec3 Q1 = dFdx(WorldPos);																		\n"
"	vec3 Q2 = dFdy(WorldPos);																		\n"
"	vec2 st1 = dFdx(TexCoords);																		\n"
"	vec2 st2 = dFdy(TexCoords);																		\n"
"																									\n"
"	vec3 N = normalize(Normal);																		\n"
"	vec3 T = normalize(Q1*st2.t - Q2*st1.t);														\n"
"	vec3 B = -normalize(cross(N, T));																\n"
"	mat3 TBN = mat3(T, B, N);																		\n"
"																									\n"
"	return normalize(TBN * tangentNormal);															\n"
"}																									\n"
"float DistributionGGX(vec3 N, vec3 H, float roughness)											  \n"
"{																								  \n"
"	float a = roughness*roughness;																  \n"
"	float a2 = a*a;																				  \n"
"	float NdotH = max(dot(N, H), 0.0);															  \n"
"	float NdotH2 = NdotH*NdotH;																	  \n"
"	float nom = a2;																				  \n"
"	float denom = (NdotH2 * (a2 - 1.0) + 1.0);													  \n"
"	denom = PI * denom * denom;																	  \n"
"	return nom / denom;																			  \n"
"}																								  \n"
"float GeometrySchlickGGX(float NdotV, float roughness)											  \n"
"{																								  \n"
"	float r = (roughness + 1.0);																  \n"
"	float k = (r*r) / 8.0;																		  \n"
"	float nom = NdotV;																			  \n"
"	float denom = NdotV * (1.0 - k) + k;														  \n"
"	return nom / denom;																			  \n"
"}																								  \n"
"float GeometrySmith(vec3 N, vec3 V, vec3 L, float roughness)									  \n"
"{																								  \n"
"	float NdotV = max(dot(N, V), 0.0);															  \n"
"	float NdotL = max(dot(N, L), 0.0);															  \n"
"	float ggx2 = GeometrySchlickGGX(NdotV, roughness);											  \n"
"	float ggx1 = GeometrySchlickGGX(NdotL, roughness);											  \n"
"	return ggx1 * ggx2;																			  \n"
"}																								  \n"
"vec3 fresnelSchlick(float cosTheta, vec3 F0)													  \n"
"{																								  \n"
"	return F0 + (1.0 - F0) * pow(clamp(1.0 - cosTheta, 0.0, 1.0), 5.0);							  \n"
"}																								  \n"
"vec3 fresnelSchlickRoughness(float cosTheta, vec3 F0, float roughness)									  \n"
"{																										  \n"
"	return F0 + (max(vec3(1.0 - roughness), F0) - F0) * pow(clamp(1.0 - cosTheta, 0.0, 1.0), 5.0);		  \n"
"}																										  \n"
"void main()																						\n"
"{																									\n"// material properties"vec3 albedo = pow(texture(albedoMap, TexCoords).rgb, vec3(2.2));								  \n""float metallic = texture(metallicMap, TexCoords).r;											  \n""float roughness = texture(roughnessMap, TexCoords).r;											  \n""float ao = texture(aoMap, TexCoords).r;														  \n""vec3 N = getNormalFromMap();		\n"
"	vec3 V = normalize(camPos - WorldPos);															\n"
" vec3 R = reflect(-V, N);\n"
"	vec3 F0 = vec3(0.04);																			\n"
"	F0 = mix(F0, albedo, metallic);																	\n"
"	vec3 Lo = vec3(0.0);																			\n"
"	for (int i = 0; i < 4; ++i)																		\n"
"	{																								\n"
"		vec3 L = normalize(lightPositions[i] - WorldPos);											\n"
"		vec3 H = normalize(V + L);																	\n"
"		float distance = length(lightPositions[i] - WorldPos);										\n"
"		float attenuation = 1.0 / (distance * distance);											\n"
"		vec3 radiance = lightColors[i] * attenuation;												\n"
"		float NDF = DistributionGGX(N, H, roughness);												\n"
"		float G = GeometrySmith(N, V, L, roughness);												\n"
"		vec3 F = fresnelSchlick(clamp(dot(H, V), 0.0, 1.0), F0);									\n"
"		vec3 numerator = NDF * G * F;																\n"
"		float denominator = 4.0 * max(dot(N, V), 0.0) * max(dot(N, L), 0.0) + 0.0001; 				\n"
"		vec3 specular = numerator / denominator;													\n"
"		vec3 kS = F;																				\n"
"		vec3 kD = vec3(1.0) - kS;																	\n"
"		kD *= 1.0 - metallic;																		\n"
"		float NdotL = max(dot(N, L), 0.0);															\n"
"		Lo += (kD * albedo / PI + specular) * radiance * NdotL;  									\n"
"	}																								\n"
// ambient lighting (we now use IBL as the ambient term)
"vec3 F = fresnelSchlickRoughness(max(dot(N, V), 0.0), F0, roughness);							 \n"
"vec3 kS = F;																					 \n"
"vec3 kD = 1.0 - kS;"
"  kD *= 1.0 - metallic;	\n"
"vec3 irradiance = texture(irradianceMap, N).rgb;"
"vec3 diffuse = irradiance * albedo;"
// sample both the pre-filter map and the BRDF lut and combine them together as per the Split-Sum approximation to get the IBL specular part.
"const float MAX_REFLECTION_LOD = 4.0;																	  \n"
"float level = roughness * MAX_REFLECTION_LOD;\n"
"vec3 prefilteredColor = vec3(0,0,0);\n"
"if(level >= 4)\n"
"{"
"prefilteredColor = texture(prefilterMap4, R).rgb;\n"
"}"
"else if(level >= 3)\n"
"{"
"prefilteredColor = texture(prefilterMap3, R).rgb;\n"
"}"
"else if(level >= 2)\n"
"{"
"prefilteredColor = texture(prefilterMap2, R).rgb;\n"
"}"
"else if(level >= 1)\n"
"{"
"prefilteredColor = texture(prefilterMap1, R).rgb;\n"
"}"
"else if(level >= 0)\n"
"{"
"prefilteredColor = texture(prefilterMap0, R).rgb;\n"
"}"
"vec2 brdf = texture(brdfLUT, vec2(max(dot(N, V), 0.0), roughness)).rg;									  \n"
"vec3 specular = prefilteredColor * (F * brdf.x + brdf.y);												  \n"
"vec3 ambient = (kD * diffuse + specular) * ao;															  \n"
"	vec3 color = ambient + Lo;																		\n"
"	color = color / (color + vec3(1.0));															\n"
"	color = pow(color, vec3(1.0 / 2.2));															\n"
"	FragColor = vec4(color, 1.0);																	\n"
//"	FragColor = vec4(1.0,0.0,0.0, 1.0);																	\n"
"}																									\n"

};

osg::ref_ptrosg::Geode CreateSphereGeode()
{
osg::ref_ptrosg::Geode geode = new osg::Geode;
osg::ref_ptrosg::Vec3Array vertices = new osg::Vec3Array(6);
(*vertices)[0].set(0.0f, 0.0f, 1.0f);
(*vertices)[1].set(-0.5f, -0.5f, 0.0f);
(*vertices)[2].set(0.5f, -0.5f, 0.0f);
(*vertices)[3].set(0.5f, 0.5f, 0.0f);
(*vertices)[4].set(-0.5f, 0.5f, 0.0f);
(*vertices)[5].set(0.0f, 0.0f, -1.0f);
osg::ref_ptrosg::DrawElementsUInt indices = new osg::DrawElementsUInt(GL_TRIANGLES, 24);
(*indices)[0] = 0; (*indices)[1] = 1; (*indices)[2] = 2;
(*indices)[3] = 0; (*indices)[4] = 2; (*indices)[5] = 3;
(*indices)[6] = 0; (*indices)[7] = 3; (*indices)[8] = 4;
(*indices)[9] = 0; (*indices)[10] = 4; (*indices)[11] = 1;
(*indices)[12] = 5; (*indices)[13] = 2; (*indices)[14] = 1;
(*indices)[15] = 5; (*indices)[16] = 3; (*indices)[17] = 2;
(*indices)[18] = 5; (*indices)[19] = 4; (*indices)[20] = 3;
(*indices)[21] = 5; (*indices)[22] = 1; (*indices)[23] = 4;
osg::ref_ptrosg::Geometry geom = new osg::Geometry;
geom->setVertexArray(vertices.get());
geom->addPrimitiveSet(indices.get());
osgUtil::SmoothingVisitor::smooth(*geom);
geode->addDrawable(geom);
return geode;

}

osg::ref_ptrosg::Geode renderSphere(osg::Vec3f pos)
{
osg::ref_ptrosg::Geode geode = new osg::Geode;
const unsigned int X_SEGMENTS = 64;
const unsigned int Y_SEGMENTS = 64;
const float PI = 3.14159265359f;
osg::ref_ptrosg::Vec3Array vertices = new osg::Vec3Array;
osg::ref_ptrosg::Vec3Array normalArray = new osg::Vec3Array;
osg::ref_ptrosg::Vec2Array texCoords = new osg::Vec2Array;
for (unsigned int x = 0; x <= X_SEGMENTS; ++x)
{
for (unsigned int y = 0; y <= Y_SEGMENTS; ++y)
{
float xSegment = (float)x / (float)X_SEGMENTS;
float ySegment = (float)y / (float)Y_SEGMENTS;
float xPos = std::cos(xSegment * 2.0f * PI) * std::sin(ySegment * PI);
float yPos = std::cos(ySegment * PI);
float zPos = std::sin(xSegment * 2.0f * PI) * std::sin(ySegment * PI);

		vertices->push_back(osg::Vec3(xPos, yPos, zPos) + pos);normalArray->push_back(osg::Vec3(xPos, yPos, zPos));texCoords->push_back(osg::Vec2(xSegment, ySegment));}
}
osg::ref_ptr<osg::DrawElementsUInt> indices = new osg::DrawElementsUInt();
bool oddRow = false;
for (unsigned int y = 0; y < Y_SEGMENTS; ++y)
{if (!oddRow) // even rows: y == 0, y == 2; and so on{for (unsigned int x = 0; x <= X_SEGMENTS; ++x){indices->push_back(y       * (X_SEGMENTS + 1) + x);indices->push_back((y + 1) * (X_SEGMENTS + 1) + x);}}else{for (int x = X_SEGMENTS; x >= 0; --x){indices->push_back((y + 1) * (X_SEGMENTS + 1) + x);indices->push_back(y       * (X_SEGMENTS + 1) + x);}}oddRow = !oddRow;
}
int indexCount = static_cast<unsigned int>(indices->size());
indices->setMode(GL_TRIANGLE_STRIP);osg::ref_ptr<osg::Geometry> geom = new osg::Geometry;
geom->setVertexArray(vertices.get());
geom->addPrimitiveSet(indices.get());
geom->setNormalArray(normalArray, osg::Array::BIND_PER_VERTEX);geom->setVertexAttribArray(1, vertices, osg::Array::BIND_PER_VERTEX);
geom->setVertexAttribArray(2, normalArray, osg::Array::BIND_PER_VERTEX);
geom->setVertexAttribArray(3, texCoords, osg::Array::BIND_PER_VERTEX);//osgUtil::SmoothingVisitor::smooth(*geom);
geode->addDrawable(geom);
return geode;

}

class EyePointCallback : public osg::UniformCallback
{
public:
EyePointCallback(osg::ref_ptrosg::Camera camera)
{
_camera = camera;
}

virtual void operator() (osg::Uniform* uniform, osg::NodeVisitor* nv)
{osg::Vec3 eye, center, up;_camera->getViewMatrixAsLookAt(eye, center, up);uniform->set(eye);
}

private:
osg::ref_ptrosg::Camera _camera;
};

class ProjectMatrixCallback : public osg::UniformCallback
{
public:
ProjectMatrixCallback(osg::ref_ptrosg::Camera camera)
{
_camera = camera;
}

virtual void operator() (osg::Uniform* uniform, osg::NodeVisitor* nv)
{osg::Matrixd projectionMatrix = _camera->getProjectionMatrix();uniform->set(projectionMatrix);
}

private:
osg::ref_ptrosg::Camera _camera;
};
class ViewMatrixCallback : public osg::UniformCallback
{
public:
ViewMatrixCallback(osg::ref_ptrosg::Camera camera)
{
_camera = camera;
}

virtual void operator() (osg::Uniform* uniform, osg::NodeVisitor* nv)
{osg::Matrixd viewMatrix = _camera->getViewMatrix();uniform->set(viewMatrix);
}

private:
osg::ref_ptrosg::Camera _camera;
};
void setImagesByLevel(osg::ref_ptrosg::TextureCubeMap textureCubemap, int level)
{

textureCubemap->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
textureCubemap->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
textureCubemap->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
textureCubemap->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
textureCubemap->setWrap(osg::Texture::WRAP_R, osg::Texture::CLAMP_TO_EDGE);std::string strDir = "D:/hdr/Prefilter/" + std::to_string(level) + "/";
std::string strImagePosX = strDir + "Right face camera.bmp";
osg::ref_ptr<osg::Image> imagePosX = osgDB::readImageFile(strImagePosX);
textureCubemap->setImage(osg::TextureCubeMap::POSITIVE_X, imagePosX);std::string strImageNegX = strDir + "Left face camera.bmp";
osg::ref_ptr<osg::Image> imageNegX = osgDB::readImageFile(strImageNegX);
textureCubemap->setImage(osg::TextureCubeMap::NEGATIVE_X, imageNegX);std::string strImagePosY = strDir + "Front face camera.bmp";;
osg::ref_ptr<osg::Image> imagePosY = osgDB::readImageFile(strImagePosY);
textureCubemap->setImage(osg::TextureCubeMap::POSITIVE_Y, imagePosY);
std::string strImageNegY = strDir + "Back face camera.bmp";;
osg::ref_ptr<osg::Image> imageNegY = osgDB::readImageFile(strImageNegY);
textureCubemap->setImage(osg::TextureCubeMap::NEGATIVE_Y, imageNegY);std::string strImagePosZ = strDir + "Top face camera.bmp";
osg::ref_ptr<osg::Image> imagePosZ = osgDB::readImageFile(strImagePosZ);
textureCubemap->setImage(osg::TextureCubeMap::POSITIVE_Z, imagePosZ);
std::string strImageNegZ = strDir + "Bottom face camera.bmp";
osg::ref_ptr<osg::Image> imageNegZ = osgDB::readImageFile(strImageNegZ);
textureCubemap->setImage(osg::TextureCubeMap::NEGATIVE_Z, imageNegZ);

}
int main()
{
//预过滤HDR环境贴图（第0-4层)

osg::ref_ptr<osg::TextureCubeMap> prefilterMap_0 = new osg::TextureCubeMap;
setImagesByLevel(prefilterMap_0, 0);
osg::ref_ptr<osg::TextureCubeMap> prefilterMap_1 = new osg::TextureCubeMap;
setImagesByLevel(prefilterMap_1, 1);
osg::ref_ptr<osg::TextureCubeMap> prefilterMap_2 = new osg::TextureCubeMap;
setImagesByLevel(prefilterMap_2, 2);
osg::ref_ptr<osg::TextureCubeMap> prefilterMap_3 = new osg::TextureCubeMap;
setImagesByLevel(prefilterMap_3, 3);
osg::ref_ptr<osg::TextureCubeMap> prefilterMap_4 = new osg::TextureCubeMap;
setImagesByLevel(prefilterMap_4, 4);//漫反射贴图
osg::ref_ptr<osg::TextureCubeMap> irradianceTextureCubeMap = new osg::TextureCubeMap;
{irradianceTextureCubeMap->setTextureSize(512, 512);irradianceTextureCubeMap->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);irradianceTextureCubeMap->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);irradianceTextureCubeMap->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);irradianceTextureCubeMap->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);irradianceTextureCubeMap->setWrap(osg::Texture::WRAP_R, osg::Texture::CLAMP_TO_EDGE);std::string strImagePosX = "D:/irradiance/Right face camera.bmp";osg::ref_ptr<osg::Image> imagePosX = osgDB::readImageFile(strImagePosX);irradianceTextureCubeMap->setImage(osg::TextureCubeMap::POSITIVE_X, imagePosX);std::string strImageNegX = "D:/irradiance/Left face camera.bmp";osg::ref_ptr<osg::Image> imageNegX = osgDB::readImageFile(strImageNegX);irradianceTextureCubeMap->setImage(osg::TextureCubeMap::NEGATIVE_X, imageNegX);std::string strImagePosY = "D:/irradiance/Front face camera.bmp";;osg::ref_ptr<osg::Image> imagePosY = osgDB::readImageFile(strImagePosY);irradianceTextureCubeMap->setImage(osg::TextureCubeMap::POSITIVE_Y, imagePosY);std::string strImageNegY = "D:/irradiance/Back face camera.bmp";;osg::ref_ptr<osg::Image> imageNegY = osgDB::readImageFile(strImageNegY);irradianceTextureCubeMap->setImage(osg::TextureCubeMap::NEGATIVE_Y, imageNegY);std::string strImagePosZ = "D:/irradiance/Top face camera.bmp";osg::ref_ptr<osg::Image> imagePosZ = osgDB::readImageFile(strImagePosZ);irradianceTextureCubeMap->setImage(osg::TextureCubeMap::POSITIVE_Z, imagePosZ);std::string strImageNegZ = "D:/irradiance/Bottom face camera.bmp";osg::ref_ptr<osg::Image> imageNegZ = osgDB::readImageFile(strImageNegZ);irradianceTextureCubeMap->setImage(osg::TextureCubeMap::NEGATIVE_Z, imageNegZ);
}
//积分贴图
osg::ref_ptr<osg::Texture2D> textureBRDFLUT = new osg::Texture2D;
{std::string strBRDFLUTImageName = "d:/hdr/lut/brdflut.bmp";osg::ref_ptr<osg::Image> brdfLUTImage = osgDB::readImageFile(strBRDFLUTImageName);textureBRDFLUT->setImage(brdfLUTImage);
}//osg::ref_ptr<osg::Uniform> prefilter0Uniform = new osg::Uniform("prefilterMap0", 0);
osg::ref_ptr<osg::Uniform> prefilter1Uniform = new osg::Uniform("prefilterMap1", 1);
osg::ref_ptr<osg::Uniform> prefilter2Uniform = new osg::Uniform("prefilterMap2", 2);
osg::ref_ptr<osg::Uniform> prefilter3Uniform = new osg::Uniform("prefilterMap3", 3);
osg::ref_ptr<osg::Uniform> prefilter4Uniform = new osg::Uniform("prefilterMap4", 4);
osg::ref_ptr<osg::Uniform> tex0Uniform = new osg::Uniform("irradianceMap", 5);
osg::ref_ptr<osg::Uniform> brdfLUTUniform = new osg::Uniform("brdfLUT", 6);//Pbr贴图
std::string strPBRDir = "D:/tutorial/LearnOpenGL-master/LearnOpenGL-master/resources/textures/pbr/";
//种类
std::vector<std::string> categoryVector;
categoryVector.clear();
categoryVector.push_back("gold");
categoryVector.push_back("grass");
categoryVector.push_back("plastic");
categoryVector.push_back("rusted_iron");
categoryVector.push_back("wall");std::vector<osg::ref_ptr<osg::Texture2D>> roughnessVector;
roughnessVector.clear();
roughnessVector.resize(5);
for (int i = 0; i < 5; i++)
{std::string str = strPBRDir + categoryVector[i] + "/roughness.bmp";osg::ref_ptr<osg::Image > img = osgDB::readImageFile(str);roughnessVector[i] = new osg::Texture2D;roughnessVector[i]->setImage(img);
}
std::vector<osg::ref_ptr<osg::Texture2D>> normalVector;
normalVector.clear();
normalVector.resize(5);
for (int i = 0; i < 5; i++)
{std::string str = strPBRDir + categoryVector[i] + "/normal.bmp";osg::ref_ptr<osg::Image > img = osgDB::readImageFile(str);normalVector[i] = new osg::Texture2D;normalVector[i]->setImage(img);
}
std::vector<osg::ref_ptr<osg::Texture2D>> metallicVector;
metallicVector.clear();
metallicVector.resize(5);
for (int i = 0; i < 5; i++)
{std::string str = strPBRDir + categoryVector[i] + "/metallic.bmp";osg::ref_ptr<osg::Image > img = osgDB::readImageFile(str);metallicVector[i] = new osg::Texture2D;metallicVector[i]->setImage(img);
}std::vector<osg::ref_ptr<osg::Texture2D>> albedoVector;
albedoVector.clear();
albedoVector.resize(5);
for (int i = 0; i < 5; i++)
{std::string str = strPBRDir + categoryVector[i] + "/albedo.bmp";osg::ref_ptr<osg::Image > img = osgDB::readImageFile(str);albedoVector[i] = new osg::Texture2D;albedoVector[i]->setImage(img);
}
std::vector<osg::ref_ptr<osg::Texture2D>> aoVector;
aoVector.clear();
aoVector.resize(5);
for (int i = 0; i < 5; i++)
{std::string str = strPBRDir + categoryVector[i] + "/ao.bmp";osg::ref_ptr<osg::Image > img = osgDB::readImageFile(str);aoVector[i] = new osg::Texture2D;aoVector[i]->setImage(img);
}osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer;osg::ref_ptr<osg::Camera> camera = viewer->getCamera();
osg::ref_ptr<osg::Uniform> camPosUniform = new osg::Uniform("camPos", osg::Vec3f(0, 0, 0));
camPosUniform->setUpdateCallback(new EyePointCallback(camera));osg::Matrix viewMatrix = camera->getViewMatrix();
osg::Matrix projMatrix = camera->getProjectionMatrix();
osg::Vec3f eye, center, up;
camera->getViewMatrixAsLookAt(eye, center, up);//osg::ref_ptr<osg::Uniform> camPosUniform = new osg::Uniform("camPos", eye);
osg::ref_ptr<osg::Uniform> viewMatrixUniform = new osg::Uniform("view", viewMatrix);
viewMatrixUniform->setUpdateCallback(new ViewMatrixCallback(camera));
osg::ref_ptr<osg::Uniform> projMatrixUniform = new osg::Uniform("projection", projMatrix);
projMatrixUniform->setUpdateCallback(new ProjectMatrixCallback(camera));
osg::ref_ptr<osg::Group> grp = new osg::Group;
//漫反射比率int nrRows = 5;
int nrColumns = 5;
float spacing = 2.5;
float ballRadius = 1.0f;osg::ref_ptr<osg::Vec3Array> lightColors = new osg::Vec3Array;
lightColors->push_back(osg::Vec3(300.0f, 300.0f, 300.0f));
lightColors->push_back(osg::Vec3(300.0f, 300.0f, 300.0f));
lightColors->push_back(osg::Vec3(300.0f, 300.0f, 300.0f));
lightColors->push_back(osg::Vec3(300.0f, 300.0f, 300.0f));osg::ref_ptr<osg::Uniform> lightColorsUniform = new osg::Uniform(osg::Uniform::FLOAT_VEC3, "lightColors", lightColors->size());
for (int i = 0; i < lightColors->size(); i++)
{lightColorsUniform->setElement(i, lightColors->at(i));
}
osg::ref_ptr<osg::Vec3Array> lightPositions = new osg::Vec3Array;
lightPositions->push_back(osg::Vec3(-10.0f, 10.0f, 10.0f));
lightPositions->push_back(osg::Vec3(10.0f, 10.0f, 10.0f));
lightPositions->push_back(osg::Vec3(-10.0f, -10.0f, 10.0f));
lightPositions->push_back(osg::Vec3(10.0f, -10.0f, 10.0f));osg::ref_ptr<osg::Uniform> lightPositionsUniform = new osg::Uniform(osg::Uniform::FLOAT_VEC3, "lightPositions", lightPositions->size());
for (int i = 0; i < lightPositions->size(); i++)
{lightPositionsUniform->setElement(i, lightPositions->at(i));
}
for (int row = 0; row < nrRows; row++)
{osg::ref_ptr<osg::Texture2D> albedoTexture = albedoVector[row];osg::ref_ptr<osg::Texture2D> normalTexture = normalVector[row];osg::ref_ptr<osg::Texture2D> metallicTexture = metallicVector[row];osg::ref_ptr<osg::Texture2D> roughnessTexture = roughnessVector[row];osg::ref_ptr<osg::Texture2D> aoTexture = aoVector[row];osg::ref_ptr<osg::Uniform> albedoUniform = new osg::Uniform("albedoMap", 7);osg::ref_ptr<osg::Uniform> normalUniform = new osg::Uniform("normalMap", 8);osg::ref_ptr<osg::Uniform> metallicUniform = new osg::Uniform("metallicMap", 9);osg::ref_ptr<osg::Uniform> roughnessUniform = new osg::Uniform("roughnessMap", 10);osg::ref_ptr<osg::Uniform> aoUniform = new osg::Uniform("aoMap", 11);for (int col = 0; col < nrColumns; col++){osg::Vec3 ballCenter((col - (nrColumns / 2)) * spacing,(row - (nrRows / 2)) * spacing,0.0f);osg::Matrix worldMatrix = osg::Matrix::translate(ballCenter);osg::Matrix inverse;inverse.invert(worldMatrix);osg::Matrix transPose;transPose.transpose(inverse);osg::ref_ptr<osg::Geode> geode = renderSphere(ballCenter);{osg::ref_ptr<osg::StateSet> stateset = geode->getOrCreateStateSet();stateset->setTextureAttributeAndModes(0, prefilterMap_0, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(1, prefilterMap_1, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(2, prefilterMap_2, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(3, prefilterMap_3, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(4, prefilterMap_4, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(5, irradianceTextureCubeMap, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(6, textureBRDFLUT, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(7, albedoTexture, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(8, normalTexture, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(9, metallicTexture, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(10, roughnessTexture, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);stateset->setTextureAttributeAndModes(11, aoTexture, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);osg::ref_ptr<osg::Shader> vs = new osg::Shader(osg::Shader::VERTEX, vertexShader_PBR);osg::ref_ptr<osg::Shader> ps = new osg::Shader(osg::Shader::FRAGMENT, psShader_PBR);osg::ref_ptr<osg::Program> program = new osg::Program;program->addBindAttribLocation("aPos", 1);program->addBindAttribLocation("aNormal", 2);program->addBindAttribLocation("aTexCoords", 3);program->addShader(vs);program->addShader(ps);//osg::ref_ptr<osg::Uniform> transposeInverseMatrixUniform = new osg::Uniform("normalMatrix", transPose);osg::Uniform* transposeInverseMatrixUniform = stateset->getOrCreateUniform("normalMatrix", osg::Uniform::FLOAT_MAT4);transposeInverseMatrixUniform->set(transPose);stateset->addUniform(lightPositionsUniform);stateset->addUniform(lightColorsUniform);stateset->addUniform(transposeInverseMatrixUniform);stateset->addUniform(viewMatrixUniform);stateset->addUniform(projMatrixUniform);stateset->addUniform(camPosUniform);stateset->addUniform(tex0Uniform);stateset->addUniform(brdfLUTUniform);stateset->addUniform(prefilter0Uniform);stateset->addUniform(prefilter1Uniform);stateset->addUniform(prefilter2Uniform);stateset->addUniform(prefilter3Uniform);stateset->addUniform(prefilter4Uniform);stateset->addUniform(albedoUniform);stateset->addUniform(normalUniform);stateset->addUniform(metallicUniform);stateset->addUniform(roughnessUniform);stateset->addUniform(aoUniform);stateset->setAttribute(program, osg::StateAttribute::ON);}grp->addChild(geode);}}
grp->addChild(renderSphere(osg::Vec3(-10.0f, 10.0f, 10.0f)));
grp->addChild(renderSphere(osg::Vec3(10.0f, 10.0f, 10.0f)));
grp->addChild(renderSphere(osg::Vec3(-10.0f, -10.0f, 10.0f)));
grp->addChild(renderSphere(osg::Vec3(10.0f, -10.0f, 10.0f)));viewer->getCamera()->setClearColor(osg::Vec4(0.1f, 0.1f, 0.1f, 1.0f));
viewer->setSceneData(grp);
viewer->run();return 0;

}

本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处：http://www.xdnf.cn/news/149097.html

如若内容造成侵权/违法违规/事实不符，请联系一条长河网进行投诉反馈，一经查实，立即删除！

相关文章

Linux基本指令（上）——“Linux”

Linux基本指令（上）——“Linux”

各位CSDN的uu们好呀&#xff0c;今天&#xff0c;小雅兰的内容是Linux啦&#xff01;&#xff01;&#xff01;主要是Linux的一些基本指令和Linux相关的基本概念&#xff08;系统层面&#xff09;&#xff0c;下面&#xff0c;让我们进入Linux的世界吧&#xff01;&#xff01;…
阅读更多...
Linux基本指令介绍系列第四篇

Linux基本指令介绍系列第四篇

文章目录 前言一、Linux基本指令介绍1、more指令2、less指令3、head指令4、tail指令5、bc指令6、管道文件介绍7、与时间相关的指令 总结 前言 本文介绍Linux使用时的部分指令&#xff0c;读者如果想了解更多基本指令的使用&#xff0c;可以关注博主的后续的文章。 博主使用的实…
阅读更多...
Sentinel安装

Sentinel安装

Sentinel 微服务保护的技术有很多&#xff0c;但在目前国内使用较多的还是Sentinel&#xff0c;所以接下来我们学习Sentinel的使用。 1.介绍和安装 Sentinel是阿里巴巴开源的一款服务保护框架&#xff0c;目前已经加入SpringCloudAlibaba中。官方网站&#xff1a; 首页 | Se…
阅读更多...
数据源报表

数据源报表

1.新建报表 2.新建数据集 3.维护数据源 支持的数据库还是蛮多哈 4.选择数据源表 5.编写sql 编码&#xff1a;SQL数据集的标识 注&#xff1a;避免特殊字符和_名称&#xff1a;SQL数据集的名称是否集合&#xff1a;否为单数据&#xff1b;是为多数据列表&#xff0c;如果多条数据…
阅读更多...
怎么通过docker/portainer部署vue项目

怎么通过docker/portainer部署vue项目

这篇文章分享一下如何通过docker将vue项目打包成镜像文件&#xff0c;并使用打包的镜像在docker/portainer上部署运行&#xff0c;写这篇文章参考了vue-cli和docker的官方文档。 首先&#xff0c;阅读vue-cli关于docker部署的说明&#xff0c;上面提供了关键的几个步骤。 从上面…
阅读更多...
opencv图像数组坐标系

opencv图像数组坐标系

在OpenCV的Python接口&#xff08;cv2&#xff09;中&#xff0c;加载的图像数组遵循以下坐标系和方向约定&#xff1a; 1. **坐标系&#xff1a;** OpenCV的坐标系遵循数学中的坐标系&#xff0c;原点&#xff08;0, 0&#xff09;位于图像的左上角。横轴&#xff08;X轴&…
阅读更多...
国庆发生的那些事儿------编写了炫酷的HTML动态鼠标特效，超级炫酷酷酷！

国庆发生的那些事儿------编写了炫酷的HTML动态鼠标特效，超级炫酷酷酷！

文章目录 前言具体操作总结 前言 国庆假期的欢乐&#xff0c;当然少不了编码爱好者&#xff01;假期编写了炫酷的HTML动态鼠标特效&#xff0c;超级炫酷酷酷&#xff01;让你的页面变得更加炫酷&#xff0c;让你的小伙伴们羡慕的大神编码&#xff01;快来看看大神是如何编写的…
阅读更多...
英伟达NVIDIA驱动安装

英伟达NVIDIA驱动安装

一般&#xff0c;我们新的显卡上机或者新系统可能就需要重新安装显卡驱动。或者是我们在配置深度学习环境时候&#xff0c;需要手动安装驱动。 官网地址&#xff1a;官方高级驱动搜索 | NVIDIA 我们选择好自己需要的驱动后直接安装即可 下载的时候&#xff0c;选择自己需要的驱…
阅读更多...
基于SpringBoot的网上超市系统

基于SpringBoot的网上超市系统

基于SpringBoot的网上超市系统的设计与实现 开发语言&#xff1a;Java数据库&#xff1a;MySQL技术&#xff1a;SpringBootMyBatis工具&#xff1a;IDEA/Ecilpse、Navicat、Maven 【主要功能】 角色&#xff1a;用户、管理员 管理员&#xff1a;个人中心、用户管理、商品分类…
阅读更多...
BIRCH算法全解析：从原理到实战

BIRCH算法全解析：从原理到实战

目录 一、引言什么是BIRCH算法BIRCH算法的应用场景文章目标和结构概述 二、BIRCH算法基础CF&#xff08;Clustering Feature&#xff09;树的概念数据点簇簇的合并和分裂 BIRCH的时间复杂度和空间复杂度BIRCH vs K-means和其他聚类算法 三、BIRCH算法的技术细节CF树的构建节点和…
阅读更多...
计算机毕设 大数据工作岗位数据分析与可视化 - python flask

计算机毕设 大数据工作岗位数据分析与可视化 - python flask

文章目录 0 前言1 课题背景2 实现效果3 项目实现3.1 概括 3.2 Flask实现3.3 HTML页面交互及Jinja2 4 **完整代码**5 最后 0 前言 &#x1f525; 这两年开始毕业设计和毕业答辩的要求和难度不断提升&#xff0c;传统的毕设题目缺少创新和亮点&#xff0c;往往达不到毕业答辩的要…
阅读更多...
word 多级目录的问题

word 多级目录的问题

一、多级标题自动编号 --> 制表符 -> 空格 网址&#xff1a; 【Word技巧】2 标题自动编号——将多级列表链接到样式 - YouTube 二、多级列表 --> 正规形式编号 网址&#xff1a;Word 教学 - 定框架&#xff1a;文档格式与多级标题&#xff01; - YouTube 三、目…
阅读更多...
osg实现鼠标框选

osg实现鼠标框选

目录 1. 需求的提出 2. 具体实现 2.1. 禁止场景跟随鼠标转动 2.2. 矩形框前置绘制 3. 附加说明 3.1. 颜色设置说明 3.2.矩形框显示和隐藏的另一种实现 1. 需求的提出 有时需要在屏幕通过按住键盘上的某个键如Ctrl键且按住鼠标左键&#xff0c;拖出一个矩形&#xff0c;实现框…
阅读更多...
[Machine learning][Part3] numpy 矢量矩阵操作的基础知识

[Machine learning][Part3] numpy 矢量矩阵操作的基础知识

很久不接触数学了&#xff0c;machine learning需要用到一些数学知识&#xff0c;这里在重温一下相关的数学基础知识 矢量 矢量是有序的数字数组。在表示法中&#xff0c;矢量用小写粗体字母表示。矢量的元素都是相同的类型。例如&#xff0c;矢量不包含字符和数字。数组中元…
阅读更多...
vertx的学习总结7

vertx的学习总结7

这里我就简单的聊几句&#xff0c;如何用vertx web来搞一个web项目的 1、首先先引入几个依赖&#xff0c;这里我就用maven了&#xff0c;这个是kotlinvertx web <?xml version"1.0" encoding"UTF-8"?> <project xmlns"http://maven.apac…
阅读更多...
Modelsim测试覆盖率操作说明

Modelsim测试覆盖率操作说明

1、打开Project窗口界面 2、在project界面下&#xff0c;选中所有需要测试覆盖率的.v文件&#xff08;不包括tb文件&#xff09;&#xff0c;鼠标点击右键&#xff0c;在Properties选项中选择Coverage选项&#xff0c;选择需要测试的覆盖率类型 3、重新编译所有的源文件&#x…
阅读更多...
(三) Markdown插入互联网或本地视频解决方案

(三) Markdown插入互联网或本地视频解决方案

前言 不论博客系统是WordPress还是Typecho&#xff0c;绕不开的是两种书写语言&#xff0c;一种称之为富文本&#xff0c;一种叫做Markdown。 Markdown有很多好处&#xff0c;也有很多坏处&#xff0c;比如Markdown本身不具备段落居中的功能&#xff0c;以及Markdown也不具有…
阅读更多...
Java架构师职责和技能

Java架构师职责和技能

目录 1 架构师简介2 架构师职责2.1 架构师是技术领导架构设计做决策2.2 架构师可以是团队或者组织2.3 架构师必须掌握足够的技术知识2.4 架构师必须掌握足够的架构设计技能2.5 架构师必须具备很好的编程能力2.6 架构师必须深入理解业务及其业务的领域知识2.7架构师应该具备很好…
阅读更多...
基于Java的驾校收支管理可视化平台设计与实现(源码+lw+部署文档+讲解等)

基于Java的驾校收支管理可视化平台设计与实现(源码+lw+部署文档+讲解等)

文章目录 前言具体实现截图论文参考详细视频演示为什么选择我自己的网站自己的小程序&#xff08;小蔡coding&#xff09;有保障的售后福利 代码参考源码获取 前言 &#x1f497;博主介绍&#xff1a;✌全网粉丝10W,CSDN特邀作者、博客专家、CSDN新星计划导师、全栈领域优质创作…
阅读更多...
二层VLAN配置实验

二层VLAN配置实验

四台PC的IP地址如图所示&#xff0c;子网掩码均为255.255.255.0&#xff0c;四台PC处在同一个局域网之中&#xff0c;在配置VLAN之前能够彼此ping通。配置的目的是将PC1和PC3划分到VLAN10中&#xff0c;PC2和PC4划分到VLAN20中。 在配置之前需要进入系统视角。 创建VLAN 在两…
阅读更多...
最新文章

Copyright @ 2022~2023