Helps! Errors In glGetAttribLocationARB

Yang Zheng · 2015-04-10T16:09:24

I have created a program and attach a vertex shader and a fragment shader. Before linking the program,I use glBindAttribLocationARB the bind the attribue location and the i use glLinkProgramARB to link the program. Linking is OK.There is still no error. But when i use glGetAttribLocationARB to get the location. The return result is wrong!! The attribue"vertex" return 0 but the "normal" return -1 which i binded into 0 and 2 Here is the shader very simple: vertex shader #version 330 core uniform mat4 MV; uniform mat4 Proj; in vec3 normal; in vec3 vertex; void main() { gl_Position=Proj*MV*vec4(vertex,1.0); } fragment shader #version 330 core void main() { } If anyone know the reason,please tell me!!

Graphics and GPU Programming Programming

Started by 562538332 April 09, 2015 06:00 PM

9 comments, last by BitMaster 9 years ago

BitMaster

8,652

April 10, 2015 04:09 PM

He wants to get the attribute location of the attribute 'normal' and he got an unexpected return value (for him). He did everything correctly except not realizing that unused attributes will be removed by the driver, resulting in the invalid location index.

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Helps! Errors In glGetAttribLocationARB

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