Removed leftover FFP code: We should now be GL2 GLSL1.30+ forward compatible. Added a seperate shader for the gradient used for water drawing. Disabled 3D mode for GL2 codepath as this still has some FFP left.

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#version 130

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in vec2 vertex;

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in vec2 texcoord;

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in vec4 colors;

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out vec2 tex;

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uniform mat4 mvp;

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void main()

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{

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    vec4 p = mvp * vec4(vertex, 0.0f, 1.0f);

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    gl_Position = p;

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    tex = texcoord;

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}