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我遇到了在我的樹莓上構建這個問題。即使我強制使用OpenGL ES，並將GLSL版本強制爲1.0 es，該着色器代碼也可以在其他幾臺計算機上使用。GLSL ES頂點着色器錯誤
將#version字符串以編程方式添加到每個着色器。
頂點着色器：
#version 100
#ifdef GL_ES
precision mediump float;
precision mediump int;
#endif
#if (__VERSION__ > 120)
#define IN in
#define OUT out
#else
#define IN attribute
#define OUT varying
#endif // __VERSION
#define MAX_LIGHTS 8
struct SLight
{
vec3 Position;
vec3 DiffuseColor;
float Intensity;
float ConstantAttenuation;
float LinearAttenuation;
float ExponentialAttenuation;
float CutoffDistance;
float CutoffIntensity;
};
struct SMaterial
{
vec3 Specular, Diffuse, Ambient;
float Shininess;
};
uniform SLight Lights[MAX_LIGHTS];
uniform int LightCount;
uniform SMaterial Material;
struct SAmbientLight
{
vec3 Color;
float Intensity;
};
uniform mat4 ModelMatrix, ViewMatrix, MVPMatrix;
uniform SAmbientLight AmbientLight;
IN vec3 VertexPosition, VertexNormal;
IN vec2 VertexTexCoord;
IN vec4 VertexColor;
OUT vec2 PerVertex_TexCoord;
OUT vec4 PerVertex_Color;
OUT vec3 PerVertex_ViewSpaceNormal, PerVertex_ViewVector;
OUT vec4 PerVertex_LightVectors[MAX_LIGHTS];
uniform bool ColoringEnabled, TexturingEnabled, LightingEnabled;
vec4 ViewSpaceLightPositions[MAX_LIGHTS];
void main()
{
mat4 ObjectToViewMatrix = ViewMatrix * ModelMatrix;
vec4 ViewSpaceCoordinate = ObjectToViewMatrix * vec4 (VertexPosition, 1.0f);
// Calculate normal in view-space
PerVertex_ViewSpaceNormal = mat3 (ObjectToViewMatrix) * VertexNormal;
// Calculate light position in view-space
for (int cont = 0; cont < LightCount; ++cont)
ViewSpaceLightPositions[cont] = (ViewMatrix * vec4 (Lights[cont].Position, 1.0f));
// Calculate vectors from the lights to this vertex
for (int cont = 0; cont < LightCount; ++cont)
PerVertex_LightVectors[cont] = ViewSpaceLightPositions[cont] - ViewSpaceCoordinate;
// Calculate view vector
PerVertex_ViewVector = -ViewSpaceCoordinate.xyz;
gl_Position = MVPMatrix * vec4 (VertexPosition, 1.0f);
PerVertex_TexCoord = VertexTexCoord;
if (ColoringEnabled)
PerVertex_Color = VertexColor;
}
片段着色器：
#version 100
#ifdef GL_ES
precision mediump float;
precision mediump int;
#endif
#if (__VERSION__ > 120)
#define IN in
#else
#define IN varying
#endif // __VERSION __
#if (__VERSION__ > 330)
#define texture2D texture
#endif
#if (__VERSION__ >= 300)
#define FRAG_OUTPUT FragOutput
out vec4 FragOutput;
#else
#define FRAG_OUTPUT gl_FragColor
#endif
#define MAX_LIGHTS 8
struct SLight
{
vec3 Position;
vec3 DiffuseColor;
float Intensity;
float ConstantAttenuation;
float LinearAttenuation;
float ExponentialAttenuation;
float CutoffDistance;
float CutoffIntensity;
};
struct SMaterial
{
vec3 Specular, Diffuse, Ambient;
float Shininess;
};
uniform SLight Lights[MAX_LIGHTS];
uniform int LightCount;
uniform SMaterial Material;
struct SAmbientLight
{
vec3 Color;
float Intensity;
};
uniform mat4 ModelMatrix, ViewMatrix, MVPMatrix;
uniform SAmbientLight AmbientLight;
IN vec2 PerVertex_TexCoord;
IN vec4 PerVertex_Color;
IN vec3 PerVertex_ViewSpaceNormal, PerVertex_ViewVector;
IN vec4 PerVertex_LightVectors[MAX_LIGHTS];
uniform bool ColoringEnabled, TexturingEnabled, LightingEnabled;
uniform sampler2D TextureSampler;
vec4 CalculateLights (void)
{
vec4 LightResult;
LightResult = vec4 (0.0f, 0.0f, 0.0f, 1.0f);
vec3 N = normalize (PerVertex_ViewSpaceNormal);
vec3 V = normalize (PerVertex_ViewVector);
for (int cont = 0; cont < LightCount; ++cont)
{
float Distance = length (PerVertex_LightVectors[cont]);
if (Distance > Lights[cont].CutoffDistance)
continue;
// Normalize the incoming N, L and V vectors
vec3 L = normalize (PerVertex_LightVectors[cont]).xyz;
vec3 H = normalize (L + V);
// Compute the diffuse and specular components for each fragment
vec3 diffuse = max (dot (N, L), 0.0f) * Material.Diffuse * Lights[cont].DiffuseColor /** Lights[cont].Intensity*/;
vec3 specular = pow (max (dot (N, H), 0.0f), Material.Shininess) * Material.Specular;
// Compute attenuation
float Attenuation = Lights[cont].ConstantAttenuation + Lights[cont].LinearAttenuation * Distance + Lights[cont].ExponentialAttenuation * pow (Distance, 2.0f);
// Final color contribution from this light
vec3 LightContribution = vec3 (diffuse + specular)/Attenuation;
if (length (LightContribution) < Lights[cont].CutoffIntensity)
continue;
LightResult += vec4 (LightContribution, 1.0f);
// LightResult += vec4 (diffuse + specular, 1.0f);
}
LightResult += vec4 (AmbientLight.Color * AmbientLight.Intensity * Material.Ambient, 1.0f);
return LightResult;
}
void main()
{
vec4 FragmentOriginalColor;
if (TexturingEnabled)
FragmentOriginalColor = texture2D (TextureSampler, PerVertex_TexCoord);
else if (ColoringEnabled)
FragmentOriginalColor = PerVertex_Color;
else
FragmentOriginalColor = vec4 (Material.Diffuse, 1.0f);
if (LightingEnabled)
FragmentOriginalColor *= CalculateLights();
if (FragmentOriginalColor.a == 0.0)
discard;
FRAG_OUTPUT = FragmentOriginalColor;
}
這是我的應用程序的輸出：
DEBUG: Video driver 1: RPI
DEBUG: Video driver 2: dummy
DEBUG: Current video driver: RPI
INFO: Initializing OpenGLES2
INFO: Initializing OpenGLES2
DEBUG: Reported GL version string : OpenGL ES 2.0
DEBUG: Reported GLSL version string : OpenGL ES GLSL ES 1.00
DEBUG: Parsed GLSL version 1.0 es
glGetError 0x500
glGetError 0x500
DEBUG: OpenGL version 2.0 es
DEBUG: GLSL version 1.0 es
DEBUG: Created window 0x160a960
DEBUG: GL program info log length 9
DEBUG: vertex shader ID 1 successfully compiled
DEBUG: GL program info log length 9
DEBUG: fragment shader ID 2 successfully compiled
DEBUG: Created shader program 3
DEBUG: GL program info log length 56
ERROR: Shader program 3 link error. ERROR:LEX/PARSE-1 (vertex shader, line 61) Syntax error
線61似乎是內部主要的第一行，兩個矩陣相乘的地方。我究竟做錯了什麼？
如果您在這裏沒有得到答案，請嘗試在[computergraphics.se]詢問。 –