Real-Time Shader Programming (The Morgan Kaufmann Series in Computer Graphics)

Effects Browser, from NVIDIA, 140, 141

electric field, of a wave of energy, 64, 65

element-by-element addition. See piecewise addition

element-by-element multiplication. See piecewise multiplication

element index, using when a MET surface is set to the sampler, 287

element masks, 269

else instruction, 217

emissive color, 34

emissive light, perceiving detail from, 23

emissive lighting, 35

endif instruction, 217-218

endloop instruction, 218-219, 234

endrep instruction, 219-220

energy, calculating the percent transmitted or reflected, 66

Engel, Wolfgang, 145

engraving style, 81-82, 83

environment, light reflected from, 39

environment illumination, 34

environment mapping, 348-350

execution time

of instructions and macroinstructions, 204

of rcp, 257

of rsq, 260

exp instruction, 301-302

exp macro, 220-221

expp instruction, 220, 221-223

eye

gamuts of, 24

perceptiveness of, 23

eye direction, specular highlights varying with, 352

eye position, 151. See also viewer position

eye space, 98