下面列出了法線貼圖的着色器代碼。儘管如此,由於生成的圖像不正確,所以代碼有問題。法線似乎沒有了。其他功能似乎工作正常,所以我認爲問題是與着色器。任何想法可能是錯的?GLSL法線貼圖問題
頂點着色器
#version 150
in vec3 position;
in vec2 texcoord;
in vec3 normal;
in vec3 tangent;
in vec3 bitangent;
out vec2 Texcoord;
out vec3 VertexPos_World;
out vec3 LightDir_Tan;
uniform vec3 lightPos0_World;
uniform mat4 model;
uniform mat4 view;
uniform mat4 proj;
void main()
{
gl_Position = proj * view * model * vec4(position, 1.0);
Texcoord = texcoord;
VertexPos_World = (model * vec4(position, 1.0)).xyz;
vec3 normal_Cam = (view * model * vec4(normal, 1.0)).xyz;
vec3 tangent_Cam = (view * model * vec4(tangent, 1.0)).xyz;
vec3 bitangent_Cam = (view * model * vec4(bitangent, 1.0)).xyz;
mat3 TBN = transpose(mat3(tangent_Cam, bitangent_Cam, normal_Cam));
vec3 lightDir_Cam = lightPos_Cam - vertexPos_Cam;
LightDir_Tan = TBN * lightDir_Cam;
}
片段着色器
#version 150
in vec2 Texcoord;
in vec3 VertexPos_World;
in vec3 LightDir_Tan;
out vec4 outColor;
uniform vec3 lightPos0_World;
uniform vec3 lightColor0;
uniform float lightPower0;
uniform vec3 ambientColor;
uniform vec3 diffuseColor;
uniform sampler2D tex0;
uniform sampler2D tex0normal;
void main()
{
float lightDistance = length(lightPos0_World - VertexPos_World);
vec3 materialDiffuseColor = texture(tex0, Texcoord).xyz * diffuseColor;
vec3 materialAmbientColor = ambientColor * materialDiffuseColor;
vec3 n = normalize(texture(tex0normal, Texcoord).rgb * 2.0 - 1.0);
vec3 l = normalize(LightDir_Tan);
float diff = clamp(dot(n,l), 0, 1);
outColor.rgb =
materialAmbientColor +
materialDiffuseColor * lightColor0 * lightPower0 * diff/(lightDistance * lightDistance);
}
你可以發佈你發送給GPU的內容嗎? –