Это действительно странно:Использование необъявленной идентификатора 'gl_LightSource'
вот некоторые журнала:
OpenGL Version = 4.1 INTEL-10.2.40
vs shaderid = 1, file = shaders/pointlight_shadow.vert
- Shader 1 (shaders/pointlight_shadow.vert) compile error: ERROR: 0:39: Use of undeclared identifier 'gl_LightSource'
BTW, я использую C++/OpenGL/GLFW/GLEW на Mac OS X 10.10. Есть ли способ проверить все версии или атрибуты, необходимые для использования «gl_LightSource» на языке шейдеров?
Shader файл:
#version 330
// Input vertex data, different for all executions of this shader.
layout(location = 0) in vec3 vertexPosition_modelspace;
layout(location = 1) in vec2 vertexUV;
layout(location = 2) in vec3 vertexNormal_modelspace;
layout(location = 3) in vec3 vertexTangent_modelspace;
layout(location = 4) in vec3 vertexBitangent_modelspace;
out vec4 diffuse,ambientGlobal, ambient;
out vec3 normal,lightDir,halfVector;
out float dist;
out vec3 fragmentcolor;
out vec4 ShadowCoord;
//Model, view, projection matrices
uniform mat4 MVP;
uniform mat4 V;
uniform mat4 M;
uniform mat3 MV3x3;
uniform mat4 DepthBiasMVP;
void main()
{
//shadow coordinate in light space...
ShadowCoord = DepthBiasMVP * vec4(vertexPosition_modelspace,1);
// first transform the normal into camera space and normalize the result
normal = normalize(MV3x3 * vertexNormal_modelspace);
// now normalize the light's direction. Note that according to the
// OpenGL specification, the light is stored in eye space.
gl_Position = MVP * vec4(vertexPosition_modelspace,1);
vec3 vertexPosition_worldspace = (M * vec4(vertexPosition_modelspace,1)).xyz;
vec3 vertexPosition_cameraspace = (V * M * vec4(vertexPosition_modelspace,1)).xyz;
//light
vec3 light0_camerapace = (V* vec4(gl_LightSource[0].position.xyz,1)).xyz;
vec3 L_cameraspace= light0_camerapace-vertexPosition_cameraspace;
lightDir = normalize(L_cameraspace);
// compute the distance to the light source to a varying variable
dist = length(L_cameraspace);
// Normalize the halfVector to pass it to the fragment shader
{
// compute eye vector and normalize it
vec3 eye = normalize(-vertexPosition_cameraspace);
// compute the half vector
halfVector = normalize(lightDir + eye);
}
// Compute the diffuse, ambient and globalAmbient terms
diffuse = gl_FrontMaterial.diffuse * gl_LightSource[0].diffuse;
ambient = gl_FrontMaterial.ambient * gl_LightSource[0].ambient;
ambientGlobal = gl_LightModel.ambient * gl_FrontMaterial.ambient;
}
Вы пропустили инструкцию '# include'? –