74 lines
1.7 KiB
GLSL
74 lines
1.7 KiB
GLSL
#version 330 core
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// per-vertex:
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in vec3 Position;
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in vec3 Normal;
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in vec2 Texture;
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// per-instance:
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in vec3 BlockPosition;
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in int BlockID;
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in int Data;
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in int TextureID;
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in int Special;
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out VS_OUT {
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vec3 Position;
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vec3 BlockPosition;
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vec3 Normal;
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vec2 Texture;
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flat int BlockID;
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flat int Data;
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flat int TextureID;
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flat int Special;
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} vs_out;
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uniform mat4 Transform;
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vec3 orientation(vec3 position)
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{
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if (Special == 1) { // oriented torch
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if (Data == 1) // "facing east"
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return vec3(position.z, position.y, -position.x);
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else if (Data == 2) // "facing west"
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return vec3(-position.z, position.y, position.x);
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else if (Data == 4) // "facing north"
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return vec3(position.x, position.y, -position.z);
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else // "facing south"
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return position;
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} else if (Special == 2) { // oriented stair
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if (Data == 0) {
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return vec3(-position.x, position.y, position.z);
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} else if (Data == 2) { //
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return vec3(position.z, position.y, -position.x);
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} else if (Data == 3) { //
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return vec3(-position.z, position.y, position.x);
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} else {
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return position;
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}
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} else if (Special == 3) {
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if (BlockPosition.x == -70) {
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return vec3(position.z, position.y, -position.x);
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} else {
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return position;
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}
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} else {
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return position;
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}
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}
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void main()
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{
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vec3 position = orientation(Position) + BlockPosition; // world coordinates
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vs_out.Position = position;
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vs_out.BlockPosition = BlockPosition;
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vs_out.Normal = orientation(Normal);
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vs_out.Texture = Texture;
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vs_out.BlockID = BlockID;
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vs_out.Data = Data;
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vs_out.TextureID = TextureID;
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vs_out.Special = Special;
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gl_Position = Transform * vec4(position.xzy, 1.0);
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}
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