GLSL ES顶点着色器错误
GLSL ES Vertex shader error
我在我的树莓派上构建它时遇到问题。即使我强制使用 OpenGL ES，并将 GLSL 版本强制为 1.0 es，同样的着色器代码也适用于其他几台计算机。
#version 字符串以编程方式添加到每个着色器。
顶点着色器：
#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;
}
这是我的应用程序的输出：
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
第 61 行似乎是 main 中的第一行，其中两个矩阵相乘。我做错了什么？
我尝试使用 PVRShaderEditor 为 GLES 编译顶点着色器（来自 Power VR SDK，这是检查 GLES 相关错误的有用工具，它允许像在 iPhone 上一样编译着色器）。
报告三个错误：
ERROR: 0:62: 'f' : suffix for floats requires language version 300
ERROR: 0:69: 'f' : suffix for floats requires language version 300
ERROR: 0:78: 'f' : suffix for floats requires language version 300
所以你只需要将顶点和片段着色器中的所有1.0f替换为1.0，问题就应该解决了，好像GLES2.0不支持f后缀。
请注意，Pi 上似乎存在一个错误，导致编译错误在程序链接时显示，而它们应该在着色器编译时显示...不知道为什么您收到的错误消息没有更详细...
我在我的树莓派上构建它时遇到问题。即使我强制使用 OpenGL ES，并将 GLSL 版本强制为 1.0 es，同样的着色器代码也适用于其他几台计算机。
#version 字符串以编程方式添加到每个着色器。
顶点着色器：
#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;
}
这是我的应用程序的输出：
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
第 61 行似乎是 main 中的第一行，其中两个矩阵相乘。我做错了什么？
我尝试使用 PVRShaderEditor 为 GLES 编译顶点着色器（来自 Power VR SDK，这是检查 GLES 相关错误的有用工具，它允许像在 iPhone 上一样编译着色器）。
报告三个错误：
ERROR: 0:62: 'f' : suffix for floats requires language version 300
ERROR: 0:69: 'f' : suffix for floats requires language version 300
ERROR: 0:78: 'f' : suffix for floats requires language version 300
所以你只需要将顶点和片段着色器中的所有1.0f替换为1.0，问题就应该解决了，好像GLES2.0不支持f后缀。
请注意，Pi 上似乎存在一个错误，导致编译错误在程序链接时显示，而它们应该在着色器编译时显示...不知道为什么您收到的错误消息没有更详细...