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所以這是我第一次使用延期着色，它非常快速和簡單。直到我開始沒有得到預期的結果。光線以一種奇怪的方式表現，就像位置紋理不正確。 
（從頂部順時針底部：（1）正常，（2）的位置，（3）反照率，（4）表面粗糙度/菲涅爾，（中心）最終）OpenGL延期着色照明無法正常工作
注意，光（在最後的渲染）表現得很怪異。
這裏是我的着色器代碼： GBuffer.vert
#version 330 core
// I didn't have time to change this into layout (location = ...) ...
attribute vec3 pos;
attribute vec3 norm;
attribute vec3 tangent;
attribute vec2 uv;
out DATA {
vec3 position;
vec3 normal;
vec2 texCoord;
mat3 tbn;
} VS_OUT;
void main() {
gl_Position = gl_ModelViewProjectionMatrix * vec4(pos, 1.0);
VS_OUT.position = (gl_ModelViewMatrix * vec4(pos, 1.0)).xyz;
VS_OUT.normal = gl_NormalMatrix * norm;
vec3 n = normalize(VS_OUT.normal);
vec3 t = normalize(gl_NormalMatrix * tangent);
t = normalize(t - dot(t, n) * n);
vec3 b = cross(t, n);
VS_OUT.tbn = mat3(t, b, n);
VS_OUT.texCoord = uv;
}
GBuffer.frag
#version 330 core
layout (location = 0) out vec3 g_position;
layout (location = 1) out vec3 g_normal;
layout (location = 2) out vec4 g_diffuse;
layout (location = 3) out vec4 g_material;
struct TSlot {
int active;
int type;
vec2 scale;
float intensity;
int blendMode;
};
struct TMaterial {
vec4 albedo;
float roughness;
float fresnel;
};
struct TScene {
vec3 ambient;
vec3 viewPosition;
};
// Textures
uniform sampler2D textures[8];
uniform TSlot textureSlots[8];
// Scene
uniform TScene scene;
// Material
uniform TMaterial material;
// Object
in DATA {
vec3 position;
vec3 normal;
vec2 texCoord;
mat3 tbn;
} FS_IN;
[... blending functions ...]
void main() {
vec3 N = FS_IN.normal;
vec4 texs = vec4(1.0);
vec4 tex0 = vec4(0.0);
for (int i = 0; i < 8; i++) {
if (textureSlots[i].active == 0) { continue; }
vec2 uv = textureSlots[i].scale * FS_IN.texCoord;
int type = textureSlots[i].type;
if (type == 0) { // Diffuse
vec4 diff = texture2D(textures[i], uv);
texs = blend(texs, diff, textureSlots[i].intensity * diff.a, textureSlots[i].blendMode);
} if (type == 1) { // Normal
vec3 encNorm = texture2D(textures[i], uv).xyz;
vec3 localCoords = normalize(vec3(2.0, 2.0, 1.0) * encNorm - vec3(1.0, 1.0, 0.0));
N *= normalize(FS_IN.tbn * localCoords);
} else if (type == 2) { // Sphere Reflection
vec3 E = normalize(scene.viewPosition - FS_IN.position);
vec3 R = normalize(reflect(E, N));
float m = 2.0 * sqrt(
pow(R.x, 2.0) +
pow(R.y, 2.0) +
pow(R.z + 1.0, 2.0)
);
vec2 tex = R.xy/m + 0.5;
vec4 diff = texture2D(textures[i], tex * textureSlots[i].scale);
texs = blend(texs, diff, textureSlots[i].intensity * diff.a, textureSlots[i].blendMode);
} else if (type == 3) { // Roughness Map
tex0.r = blendNormalFloat(tex0.r, texture2D(textures[i], uv).x, textureSlots[i].intensity);
} else if (type == 4) { // Fresnel Map
tex0.g = blendNormalFloat(tex0.g, texture2D(textures[i], uv).x, textureSlots[i].intensity);
}
}
// Outputs
g_position = FS_IN.position;
g_normal = N;
g_diffuse.rgb = texs.rgb * material.albedo.rgb;
g_diffuse.a = 1.0;
g_material = vec4(material.roughness + tex0.r, material.fresnel + tex0.g, 0.0, 0.0);
}
Lighting.vert
#version 330 core
void main() {
gl_Position = ftransform();
gl_TexCoord[0] = gl_MultiTexCoord0;
gl_FrontColor = vec4(1.0, 1.0, 1.0, 1.0);
}
Lighting.frag
#version 330 core
layout (location = 0) out vec4 fragColor;
struct TLight {
vec3 position;
float intensity;
vec3 color;
float radius;
float cutoff;
float spotCutoff;
vec3 direction;
int type;
};
struct TScene {
vec3 ambient;
vec3 viewPosition;
};
// Textures from GBuffer
uniform sampler2D t_position;
uniform sampler2D t_normal;
uniform sampler2D t_diffuse;
uniform sampler2D t_material;
uniform TLight light;
uniform TScene scene;
void main() {
vec2 uv = gl_TexCoord[0].xy;
vec3 P = texture2D(t_position, uv).xyz;
vec3 N = normalize(texture2D(t_normal, uv).xyz);
vec4 D = texture2D(t_diffuse, uv);
vec4 M = texture2D(t_material, uv);
vec3 lighting = D.rgb * 0.1;
vec3 V = normalize(scene.viewPosition - P);
vec3 lightDir = normalize(light.position - P);
vec3 diffuse = max(dot(N, lightDir), 0.0) * D.rgb * light.color * light.intensity;
lighting += diffuse;
fragColor = vec4(lighting, 1.0);
}
我下面這些教程：http://www.codinglabs.net/tutorial_simple_def_rendering.aspx http://learnopengl.com/#!Advanced-Lighting/Deferred-Shading
編輯：原來我只是需要使用float紋理法線和位置
看起來很奇怪的一件事是，您在着色器中使用'core'配置文件，但着色器仍然使用舊功能（'gl_ModelViewProjectionMatrix等） – SurvivalMachine
@SurvivalMachine這將在未來進行更改，我在學習現代OpenGL的過程中。我仍然使用舊功能，因爲它的設置和原型更快。 – dcubix
嗯，我本可以發佈：「我想讓別人分析我的代碼」但是我沒有，所以如果有人真的回答了正確的答案，這將非常好。 – dcubix