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I’m trying to send some vectors from vertex shader to fragment shader:
ex:
vec3 N = (view*model*vNormal).xyz
and when trying to reach it in fragment shader:
Link errorERROR: Input of fragment shader 'N' not written by vertex shader
any ideas?
To pass values between shader stages you must use so called varyings; the keywords are
varyingoroutandin– there was a keyword change between GLSL 1.20 to 1.40 but the basic gist that you need special type qualifiers. See http://www.opengl.org/wiki/GLSL_Type_Qualifiers#Shader_stage_inputs_and_outputs for the details.