我的镜面照明有一些问题，环境和漫反射都存在，但是我现在正在考虑使用镜面反射来尝试制作美观的模型。
我的vertexShader中包含以下内容：
#version 330
layout (location = 0) in vec3 Position;
layout (location = 1) in vec3 Normal;
out vec4 Colour0;
// Transforms
uniform mat4 gModelToWorldTransform;
uniform mat4 gWorldToViewToProjectionTransform;
// Ambient light parameters
uniform vec3 gAmbientLightIntensity;
// Directional light parameters
uniform vec3 gDirectionalLightIntensity;
uniform vec3 gDirectionalLightDirection;
// Material constants
uniform float gKa;
uniform float gKd;
uniform float gKs;
uniform float gKsStrength;
void main()
{
// Transform the vertex from local space to homogeneous clip space
vec4 vertexPositionInModelSpace = vec4(Position, 1);
vec4 vertexInWorldSpace = gModelToWorldTransform * vertexPositionInModelSpace;
vec4 vertexInHomogeneousClipSpace = gWorldToViewToProjectionTransform * vertexInWorldSpace;
gl_Position = vertexInHomogeneousClipSpace;
// Calculate the directional light intensity at the vertex
// Find the normal in world space and normalise it
vec3 normalInWorldSpace = (gModelToWorldTransform * vec4(Normal, 0.0)).xyz;
normalInWorldSpace = normalize(normalInWorldSpace);
// Calculate the ambient light intensity at the vertex
// Ia = Ka * ambientLightIntensity
vec4 ambientLightIntensity = gKa * vec4(gAmbientLightIntensity, 1.0);
// Setup the light direction and normalise it
vec3 lightDirection = normalize(-gDirectionalLightDirection);
//lightDirection = normalize(gDirectionalLightDirection);
// Id = kd * lightItensity * N.L
// Calculate N.L
float diffuseFactor = dot(normalInWorldSpace, lightDirection);
diffuseFactor = clamp(diffuseFactor, 0.0, 1.0);
// N.L * light source colour * intensity
vec4 diffuseLightIntensity = gKd * vec4(gDirectionalLightIntensity, 1.0f) * diffuseFactor;
vec3 lightReflect = normalize(reflect(gDirectionalLightDirection, Normal));
//Calculate the specular light intensity at the vertex
float specularFactor = dot(normalInWorldSpace, lightReflect);
specularFactor = pow(specularFactor, gKsStrength);
vec4 specularLightIntensity = gKs * vec4(gDirectionalLightIntensity, 1.0f) * specularFactor;
// Final vertex colour is the product of the vertex colour
// and the total light intensity at the vertex
vec4 colour = vec4(0.0, 1.0, 0.0, 1.0);
Colour0 = colour * (ambientLightIntensity + diffuseLightIntensity + specularLightIntensity);
}
然后在main.cpp中，我有一些代码可以尝试使之协同工作，镜面反射光绝对是在做某件事，这不仅是使模型看起来发亮，还在于将光增强到可以的程度。看不到任何细节。
我创建以下变量：
// Lighting uniforms location
GLuint gAmbientLightIntensityLoc;
GLuint gDirectionalLightIntensityLoc;
GLuint gDirectionalLightDirectionLoc;
GLuint gSpecularLightIntensityLoc;
// Materials uniform location
GLuint gKaLoc;
GLuint gKdLoc;
GLuint gKsLoc;
GLuint gKsStrengthLoc;
然后，在主菜单中调用的
renderSceneCallBack()函数中像这样设置变量：// Set the material properties
glUniform1f(gKaLoc, 0.2f);
glUniform1f(gKdLoc, 0.9f);
glUniform1f(gKsLoc, 0.5f);
glUniform1f(gKsStrengthLoc, 0.5f);
然后，我创建一个
initLights()函数，该函数要处理所有照明，这在主体中也称为：static void initLights()
{
// Setup the ambient light
vec3 ambientLightIntensity = vec3(0.2f, 0.2f, 0.2f);
glUniform3fv(gAmbientLightIntensityLoc, 1, &ambientLightIntensity[0]);
// Setup the direactional light
vec3 directionalLightDirection = vec3(0.0f, 0.0f, -1.0f);
normalize(directionalLightDirection);
glUniform3fv(gDirectionalLightDirectionLoc, 1, &directionalLightDirection[0]);
vec3 directionalLightIntensity = vec3(0.8f, 0.8f, 0.8f);
glUniform3fv(gDirectionalLightIntensityLoc, 1, &directionalLightIntensity[0]);
//Setup the specular Light
vec3 specularLightIntensity = vec3(0.5f, 0.5f, 0.5f);
glUniform3fv(gSpecularLightIntensityLoc, 1, &specularLightIntensity[0]);
}
谁能看到我可能在做错的事情，我可能会有一些计算错误，但我只是没有看到。环境/漫射照明均正常工作。这张照片说明了当前发生的情况，左侧为环境，右侧为强度设置为30，中间为高光反射。
回答
我忘了将此值传递给主要对象：
gKsStrengthLoc = glGetUniformLocation(shaderProgram, "gKsStrength");
//assert(gDirectionalLightDirectionLoc != 0xFFFFFFFF);
现在，所有工作都可以使用选定的答案
最佳答案
您的gKsStrength值看起来太小了：
glUniform1f(gKsStrengthLoc, 0.5f);
该值控制对象的光泽度，较高的值使对象更具光泽。如果您查看着色器中的计算，这将很有意义：
specularFactor = pow(specularFactor, gKsStrength);
指数越大，该值下降得越快，这意味着镜面高光变得更窄。
对于中等光泽，典型值可能约为10.0f，对于完全光泽的值为30.0f，对于非常光泽的材料甚至更高。
值为0.5f，您将获得非常宽的镜面反射“亮点”。镜面反射强度的值也很高（0.5），因此高光将覆盖大部分对象，并使大部分的颜色饱和。