DPaste - Paste #1381 - pastebin, online compiler and collaboration tool dedicated to D Programming Language

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struct TextureSlice(float w, float h) {
    static const float width = w;
    static const float height = h;

static const float x_step = 1.0f/width;
    static const float y_step = 1.0f/height;
    
    byte x;
    byte y;

alias texcoords this;

this(byte lower_left_x, byte lower_left_y) {
        x = lower_left_x;
        y = lower_left_y;
    }

@property byte[2][4] texcoords() {
        return [[cast(byte)x,     cast(byte)y],
                [cast(byte)(x+1), cast(byte)y],
                [cast(byte)(x+1), cast(byte)(y-1)],
                [cast(byte)x,     cast(byte)(y-1)]];
    }

@property byte[2][4] texcoords_90() {
        return [[cast(byte)(x+1), cast(byte)y],
                [cast(byte)(x+1), cast(byte)(y-1)],
                [cast(byte)x,     cast(byte)(y-1)],
                [cast(byte)x,     cast(byte)y]];
    }

@property byte[2][4] texcoords_180() {
        return [[cast(byte)(x+1), cast(byte)(y-1)],
                [cast(byte)x,     cast(byte)(y-1)],
                [cast(byte)x,     cast(byte)y],
                [cast(byte)(x+1), cast(byte)y]];
    }

@property byte[2][4] texcoords_270() {
        return [[cast(byte)x,     cast(byte)(y-1)],
                [cast(byte)x,     cast(byte)y],
                [cast(byte)(x+1), cast(byte)y],
                [cast(byte)(x+1), cast(byte)(y-1)]];
    }
}

alias TextureSlice!(16, 16) MCTextureSlice;

struct CubeSideData {
    float[3][4] positions; // 3*4, it's a cube!
    float[3] normal;
}

immutable CubeSideData[6] CUBE_VERTICES = [
    { [[-0.5f, -0.5f, 0.5f], [0.5f, -0.5f, 0.5f], [0.5f, 0.5f, 0.5f], [-0.5f, 0.5f, 0.5f]], // front
       [0.0f, 0.0f, 1.0f] },
    
    { [[-0.5f, -0.5f, -0.5f], [-0.5f, -0.5f, 0.5f], [-0.5f, 0.5f, 0.5f], [-0.5f, 0.5f, -0.5f]], // left
       [-1.0f, 0.0f, 0.0f] },

{ [[0.5f, -0.5f, -0.5f], [-0.5f, -0.5f, -0.5f], [-0.5f, 0.5f, -0.5f], [0.5f, 0.5f, -0.5f]], // back
       [0.0f, 0.0f, -1.0f] },

{ [[0.5f, -0.5f, 0.5f], [0.5f, -0.5f, -0.5f], [0.5f, 0.5f, -0.5f], [0.5f, 0.5f, 0.5f]], // right
       [1.0f, 0.0f, 0.0f] },

{ [[-0.5f, 0.5f, 0.5f], [0.5f, 0.5f, 0.5f], [0.5f, 0.5f, -0.5f], [-0.5f, 0.5f, -0.5f]], // top
       [0.0f, 1.0f, 0.0f]  },

{ [[-0.5f, -0.5f, -0.5f], [0.5f, -0.5f, -0.5f], [0.5f, -0.5f, 0.5f], [-0.5f, -0.5f, 0.5f]], // bottom
       [0.0f, -1.0f, 0.0f] }
];

private const byte[2][4] nslice = MCTextureSlice(-1, -1).texcoords;

Vertex[] simple_block(Side side, byte[2][4] texture_slice) pure {
    return simple_block(side, texture_slice, nslice);
}

Vertex[] simple_block(Side side, byte[2][4] texture_slice, byte[2][4] mask_slice) pure {
    CubeSideData cbsd = CUBE_VERTICES[side];

float[3][6] positions = to_triangles(cbsd.positions);
    byte[2][6] texcoords = to_triangles(texture_slice);
    byte[2][6] mask;
    if(mask_slice == nslice) {
        mask = texcoords;
    } else {
        mask = to_triangles(mask_slice);
    }

Vertex[6] data;

foreach(i; 0..6) {
        data[i] = Vertex(positions[i][0], positions[i][1], positions[i][2],
                         cbsd.normal[0], cbsd.normal[1], cbsd.normal[2],
                         texcoords[i][0], texcoords[i][1],
                         mask[i][0], mask[i][1],
                         0, 0);
    }

return data.dup;
}

template WoolPair(byte xi, byte yi) {
    enum x = xi;
    enum y = yi;
}

void wool_block(Side s)(const ref Block block, const ref BiomeData biome_data,
                            float x_offset, float y_offset, float z_offset) {
        static string wool_vertices() {
            return `enum vertices = simple_block(s, MCTextureSlice(slice.x, slice.y).texcoords);
                    add_template_vertices(vertices, x_offset, y_offset, z_offset, 0, 0);`;
        }

alias WoolPair t;
        final switch(block.metadata) {                                                     
            foreach(i, slice; TypeTuple!(t!(0, 5),  t!(2, 14), t!(2, 13), t!(2, 12), t!(2, 11), t!(2, 10), t!(2, 9), t!(2, 8),
                                         t!(1, 15), t!(1, 14), t!(1, 13), t!(1, 12), t!(1, 11), t!(1, 10), t!(1, 9), t!(1, 8))) {
                case i: mixin(wool_vertices()); break;
            }
        }
    }

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Author: dav1d

Views: 152

Private: no

Expires: Never

Uploaded: 17.08.12 18:21

Votes: 0

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