gltut / Tut 03 OpenGLs Moving Triangle / vertCalcOffset.cpp

Diff from to

Tut 03 OpenGLs Moving Triangle/vertCalcOffset.cpp

 #include "../framework/framework.h"
 GLuint theProgram;
-GLuint positionAttrib;
 GLuint elapsedTimeUniform;
 void InitializeProgram()
 	theProgram = Framework::CreateProgram(shaderList);
-	positionAttrib = glGetAttribLocation(theProgram, "position");
 	elapsedTimeUniform = glGetUniformLocation(theProgram, "time");
 	GLuint loopDurationUnf = glGetUniformLocation(theProgram, "loopDuration");
 	glUniform1f(elapsedTimeUniform, glutGet(GLUT_ELAPSED_TIME) / 1000.0f);
 	glBindBuffer(GL_ARRAY_BUFFER, positionBufferObject);
-	glEnableVertexAttribArray(positionAttrib);
-	glVertexAttribPointer(positionAttrib, 4, GL_FLOAT, GL_FALSE, 0, 0);
+	glEnableVertexAttribArray(0);
+	glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, 0);
 	glDrawArrays(GL_TRIANGLES, 0, 3);
-	glDisableVertexAttribArray(positionAttrib);
+	glDisableVertexAttribArray(0);
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