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GLSL - Shader Phonga » 2014-03-01 16:11:47 Mam taki oto shader: Wierzchołków: in vec4 vVertex;
in vec3 vNormal;
uniform mat4 mvpMatrix;
uniform mat4 mvMatrix;
uniform mat3 normalMatrix;
uniform vec3 vLightPosition;
out vec3 vVaryingNormal;
out vec3 vVaryingLightDir;
void main( void )
{
vVaryingNormal = normalMatrix * vNormal;
vec4 vPosition4 = mvMatrix * vVertex;
vec3 vPosition3 = vPosition4.xyz / vPosition4.w;
vVaryingLightDir = normalize( vLightPosition - vPosition3 );
gl_Position = mvpMatrix * vVertex;
}
Fragmentów: out vec4 vFragColor;
uniform vec4 ambientColor;
uniform vec4 diffuseColor;
uniform vec4 specularColor;
in vec3 vVaryingNormal;
in vec3 vVaryingLightDir;
void main( void )
{
float diff = max( 0.0, dot( normalize( vVaryingNormal ), normalize( vVaryingLightDir ) ) );
vFragColor = diff * diffuseColor;
vFragColor += ambientColor;
vec3 vReflection = normalize( reflect( - normalize( vVaryingLightDir ), normalize( vVaryingNormal ) ) );
float spec = max( 0.0, dot( normalize( vVaryingNormal ), vReflection ) );
if( diff != 0 )
{
float fSpec = pow( spec, 128.0 );
vFragColor.rgb += vec3( fSpec, fSpec, fSpec );
}
}
W tym shaderze działa światło rozproszone (diffuse), ale nie działa światło otaczające (ambient) i odbicia lustrzanego (specular). Nie wiem, czy jest to wina shadera, czy może kodu klienckiego: GLShaderManager shaderManager;
GLGeometryTransform M;
GLMatrixStack M1;
GLMatrixStack M2;
GLFrustum frustum;
GLFrame camera;
GLTriangleBatch btch;
GLuint ShaderID;
GLuint locDColor, locAColor, locSColor;
GLuint locLight;
GLuint locMVP;
GLuint locMV;
GLuint locNM;
void ChangeSize( int w, int h )
{
if( h == 0 )
h = 1;
glViewport( 0, 0, w, h );
frustum.SetPerspective( 80.0f, float( w ) / float( h ), 1.0f, 1000.0f );
M2.LoadMatrix( frustum.GetProjectionMatrix() );
M.SetMatrixStacks( M1, M2 );
}
void SetupRC()
{
glClearColor( 0.0f, 0.0f, 1.0f, 1.0f );
glEnable( GL_DEPTH_TEST );
glEnable( GL_CULL_FACE );
camera.MoveForward( - 4.0f );
gltMakeTorus( btch, 0.8f, 0.15f, 50, 20 );
ShaderID = gltLoadShaderPairWithAttributes( "shd.vp", "shd.fp", 2, GLT_ATTRIBUTE_VERTEX, "vVertex", GLT_ATTRIBUTE_NORMAL, "vNormal" );
locDColor = glGetUniformLocation( ShaderID, "diffuseColor" );
locAColor = glGetUniformLocation( ShaderID, "ambientColor" );
locSColor = glGetUniformLocation( ShaderID, "specularColor" );
locLight = glGetUniformLocation( ShaderID, "vLightPosition" );
locMVP = glGetUniformLocation( ShaderID, "mvpMatrix" );
locMV = glGetUniformLocation( ShaderID, "mvMatrix" );
locNM = glGetUniformLocation( ShaderID, "normalMatrix" );
}
void RenderScene()
{
static sf::Clock clock;
if( sf::Keyboard::isKeyPressed( sf::Keyboard::Up ) || sf::Keyboard::isKeyPressed( sf::Keyboard::W ) )
camera.MoveForward( 0.005f );
if( sf::Keyboard::isKeyPressed( sf::Keyboard::Down ) || sf::Keyboard::isKeyPressed( sf::Keyboard::S ) )
camera.MoveForward( - 0.005f );
if( sf::Keyboard::isKeyPressed( sf::Keyboard::Left ) )
camera.RotateWorld( m3dDegToRad( 0.1f ), 0.0f, 1.0f, 0.0f );
if( sf::Keyboard::isKeyPressed( sf::Keyboard::Right ) )
camera.RotateWorld( - m3dDegToRad( 0.1f ), 0.0f, 1.0f, 0.0f );
if( sf::Keyboard::isKeyPressed( sf::Keyboard::A ) )
camera.MoveRight( 0.005f );
if( sf::Keyboard::isKeyPressed( sf::Keyboard::D ) )
camera.MoveRight( - 0.005f );
if( sf::Keyboard::isKeyPressed( sf::Keyboard::Escape ) )
exit( 0 );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
GLfloat vEyeLight[] = { - 100.0f, 100.0f, 100.0f };
GLfloat vDiffuseColor[] = { 1.0f, 0.0f, 0.0f, 1.0f };
GLfloat vAmbientColor[] = { 0.0f, 1.0f, 0.0f, 1.0f };
GLfloat vSpecularColor[] = { 0.0f, 0.0f, 1.0f, 1.0f };
M3DMatrix44f mcamera;
camera.GetCameraMatrix( mcamera );
M1.PushMatrix();
M1.PushMatrix( mcamera );
M1.Rotate( clock.getElapsedTime().asSeconds() * 60.0f, 0.0f, 1.0f, 0.0f );
glUseProgram( ShaderID );
glUniform4fv( locDColor, 1, vDiffuseColor );
glUniform4fv( locAColor, 1, vAmbientColor );
glUniform4fv( locSColor, 1, vSpecularColor );
glUniform3fv( locLight, 1, vEyeLight );
glUniformMatrix4fv( locMVP, 1, GL_FALSE, M.GetModelViewProjectionMatrix() );
glUniformMatrix4fv( locMV, 1, GL_FALSE, M.GetModelViewMatrix() );
glUniformMatrix3fv( locNM, 1, GL_FALSE, M.GetNormalMatrix() );
btch.Draw();
M1.PopMatrix();
M1.PushMatrix( mcamera );
M1.Translate( - 4.0f, 0.0f, 6.0f );
glUseProgram( ShaderID );
glUniform4fv( locDColor, 1, vDiffuseColor );
glUniform4fv( locAColor, 1, vAmbientColor );
glUniform4fv( locSColor, 1, vSpecularColor );
glUniform3fv( locLight, 1, vEyeLight );
glUniformMatrix4fv( locMVP, 1, GL_FALSE, M.GetModelViewProjectionMatrix() );
glUniformMatrix4fv( locMV, 1, GL_FALSE, M.GetModelViewMatrix() );
glUniformMatrix3fv( locNM, 1, GL_FALSE, M.GetNormalMatrix() );
btch.Draw();
M1.PopMatrix();
M1.PopMatrix();
glutSwapBuffers();
glutPostRedisplay();
}
int main( int argc, char * argv[] )
{
gltSetWorkingDirectory( argv[ 0 ] );
glutInit( & argc, argv );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH );
glutInitWindowSize( 800, 600 );
glutCreateWindow( "OpenGL - Window" );
glutReshapeFunc( ChangeSize );
glutDisplayFunc( RenderScene );
GLenum err = glewInit();
if( GLEW_OK != err )
{
std::cout << err << std::endl;
return 1;
}
SetupRC();
glutMainLoop();
}
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