计算机图形学 —— OpenGL纹理贴图
Main.cpp
#include mish.h
#pragma once
#include mish.cpp
#include "misc.h"
#include specularTexture.vs
attribute vec3 pos;
attribute vec2 texcoord;
attribute vec3 normal;
uniform mat4 M;
uniform mat4 V;
uniform mat4 P;
uniform mat4 NM;
uniform sampler2D U_MainTexture;
varying vec3 V_Normal;
varying vec4 V_WorldPos;
varying vec2 V_Texcoord;
void main()
{
V_Normal = mat3(NM) * normal;
V_WorldPos = M*vec4(pos,1.0);
V_Texcoord = texcoord;
gl_Position=P*V*M*vec4(pos,1.0);
}
specularTexture.fs
//uniform vec4 U_AmbientLightColor;
//uniform vec4 U_AmbientMaterial;
uniform sampler2D U_MainTexture;
varying vec3 V_Normal;
varying vec4 V_WorldPos;
varying vec2 V_Texcoord;
void main()
{
vec3 lightPos = vec3(10.0,10.0,0.0);
vec3 L = lightPos;
L = normalize(L);
vec3 n = normalize(V_Normal);
//ambient
vec4 AmbientLightColor = vec4(0.2,0.2,0.2,1.0);
vec4 AmbientMaterial = vec4(0.2,0.2,0.2,1.0);
vec4 ambientColor = AmbientLightColor * AmbientMaterial;
//diffuse
vec4 DiffuseLightColor = vec4(1.0,1.0,1.0,1.0);
vec4 DiffuseMaterial = vec4(0.8,0.8,0.8,1.0);
vec4 diffuseColor = DiffuseLightColor * DiffuseMaterial * max(0.0, dot(L,n));
//specular
vec3 reflectDir = normalize(reflect(-L,n));
vec4 SpecularLightColor = vec4(1.0,1.0,1.0,1.0);
vec4 SpecularMaterial = vec4(0.4,0.4,0.4,1.0);
//inverse view direction
vec3 viewDir = normalize(vec3(0.0) - V_WorldPos.xyz);
vec4 specularColor = SpecularLightColor * SpecularMaterial * pow(max(0.0, dot(viewDir, reflectDir)), 18.0);
if(diffuseColor.r == 0.0)
{
gl_FragColor = ambientColor + texture2D(U_MainTexture, V_Texcoord) * diffuseColor;
}
else{
gl_FragColor = ambientColor + texture2D(U_MainTexture, V_Texcoord) * diffuseColor; //+ specularColor;
}
}