CODEWITHSUNDEEP
opengl-es-2.0
John
John

Reputation: 727

Passing attributes to shader

I am using OPEN GL ES2.0 on Android.

I need pass two attributes to shader, one for position, one for texture coordinates, 

//vertices for position
vertices = new float[12] { -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f,
        -1.0f, 1.0f, 1.0f, -1.0f, 1.0f };

//vertices for texture coordinates.
txtVertices = new float[12] { 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f,
        0.0f, 1.0f, 1.0f, 0.0f, 1.0f };


//Passing to shader.
    glVertexAttribPointer(texCoordHandle, 2, GL_FLOAT, GL_FALSE, 0,
        txtVertices);
glVertexAttribPointer(vPositionHandle, 2, GL_FLOAT, GL_FALSE, 0, vertices);


glEnableVertexAttribArray(vPositionHandle);
glEnableVertexAttribArray(texCoordHandle);


glDrawArrays(GL_TRIANGLES, 0, 6);

glDisableVertexAttribArray(vPositionHandle);
glDisableVertexAttribArray(texCoordHandle);

What's the problem of this piece of code? it's like the second one override the first one, and only one vertices are passed into my shader.

Upvotes: 0

Views: 134

Answers (1)

VivekParamasivam
VivekParamasivam

Reputation: 1154

it seems that ther is no error in the code you posted.

may have errors in shaders or in some other part

don't you pass 3 floats for vertexposition(x,y,z)

Upvotes: 1

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