NAME

glGetMaterialfv, glGetMaterialiv - return material parameters

C SPECIFICATION

void ggllGGeettMMaatteerriiaallffvv( GLenum _f_a_c_e,
                      GLenum _p_n_a_m_e,
                      GLfloat _*_p_a_r_a_m_s )
void ggllGGeettMMaatteerriiaalliivv( GLenum _f_a_c_e,
                      GLenum _p_n_a_m_e,
                      GLint _*_p_a_r_a_m_s )

delim $$

PARAMETERS

_f_a_c_e
Specifies which of the two materials is being queried. GGLL__FFRROONNTT or GGLL__BBAACCKK are accepted, representing the front and back materials, respectively.
_p_n_a_m_e
Specifies the material parameter to return. GGLL__AAMMBBIIEENNTT, GGLL__DDIIFFFFUUSSEE, GGLL__SSPPEECCUULLAARR, GGLL__EEMMIISSSSIIOONN, GGLL__SSHHIINNIINNEESSSS, and GGLL__CCOOLLOORR__IINNDDEEXXEESS are accepted.
_p_a_r_a_m_s
Returns the requested data.

DESCRIPTION

ggllGGeettMMaatteerriiaall returns in _p_a_r_a_m_s the value or values of parameter _p_n_a_m_e of material _f_a_c_e. Six parameters are defined:
GGLL__AAMMBBIIEENNTT
_p_a_r_a_m_s returns four integer or floating-point values representing the ambient reflectance of the material. Integer values, when requested, are linearly mapped from the internal floating-point representation such that 1.0 maps to the most positive representable integer value, and -1.0 maps to the most negative representable integer value. If the internal value is outside the range [-1, 1], the corresponding integer return value is undefined. The initial value is (0.2, 0.2, 0.2, 1.0)
GGLL__DDIIFFFFUUSSEE
_p_a_r_a_m_s returns four integer or floating-point values representing the diffuse reflectance of the material. Integer values, when requested, are linearly mapped from the internal floating-point representation such that 1.0 maps to the most positive representable integer value, and -1.0 maps to the most negative representable integer value. If the internal value is outside the range [-1, 1], the corresponding integer return value is undefined. The initial value is (0.8, 0.8, 0.8, 1.0).
GGLL__SSPPEECCUULLAARR
_p_a_r_a_m_s returns four integer or floating-point values representing the specular reflectance of the material. Integer values, when requested, are linearly mapped from the internal floating-point representation such that 1.0 maps to the most positive representable integer value, and -1.0 maps to the most negative representable integer value. If the internal value is outside the range [-1, 1], the corresponding integer return value is undefined. The initial value is (0, 0, 0, 1).
GGLL__EEMMIISSSSIIOONN
_p_a_r_a_m_s returns four integer or floating-point values representing the emitted light intensity of the material. Integer values, when requested, are linearly mapped from the internal floating-point representation such that 1.0 maps to the most positive representable integer value, and -1.0 maps to the most negative representable integer value. If the internal value is outside the range [-1, 1.0], the corresponding integer return value is undefined. The initial value is (0, 0, 0, 1).
GGLL__SSHHIINNIINNEESSSS
_p_a_r_a_m_s returns one integer or floating-point value representing the specular exponent of the material. Integer values, when requested, are computed by rounding the internal floating-point value to the nearest integer value. The initial value is 0.
GGLL__CCOOLLOORR__IINNDDEEXXEESS
_p_a_r_a_m_s returns three integer or floating-point values representing the ambient, diffuse, and specular indices of the material. These indices are used only for color index lighting. (All the other parameters are used only for RGBA lighting.) Integer values, when requested, are computed by rounding the internal floating-point values to the nearest integer values.

NOTES

If an error is generated, no change is made to the contents of _p_a_r_a_m_s.

ERRORS

GGLL__IINNVVAALLIIDD__EENNUUMM is generated if _f_a_c_e or _p_n_a_m_e is not an accepted value.

GGLL__IINNVVAALLIIDD__OOPPEERRAATTIIOONN is generated if ggllGGeettMMaatteerriiaall is executed between the execution of ggllBBeeggiinn and the corresponding execution of ggllEEnndd.

SEE ALSO

ggllMMaatteerriiaall((33GG))