4jcraft/Minecraft.Client/Rendering/Cube.cpp

#include "../Platform/stdafx.h"
#include "Models/Model.h"
#include "Models/ModelPart.h"
#include "Cube.h"

// 4J - added - helper function to set up vertex arrays
VertexArray Cube::VertexArray4(Vertex* v0, Vertex* v1, Vertex* v2, Vertex* v3) {
    VertexArray ret = VertexArray(4);
    ret[0] = v0;
    ret[1] = v1;
    ret[2] = v2;
    ret[3] = v3;

    return ret;
}

// void Cube::addBox(float x0, float y0, float z0, int w, int h, int d, float g)
Cube::Cube(ModelPart* modelPart, int xTexOffs, int yTexOffs, float x0, float y0,
           float z0, int w, int h, int d, float g, int faceMask /* = 63 */,
           bool bFlipPoly3UVs)
    :  // 4J - added faceMask, added bFlipPoly3UVs to reverse the uvs back so
       // player skins display right
      x0(x0),
      y0(y0),
      z0(z0),
      x1(x0 + w),
      y1(y0 + h),
      z1(z0 + d) {
    // 	this->x0 = x0;
    // 	this->y0 = y0;
    // 	this->z0 = z0;
    // 	this->x1 = x0 + w;
    // 	this->y1 = y0 + h;
    // 	this->z1 = z0 + d;

    vertices = VertexArray(8);
    polygons = PolygonArray(6);

    float x1 = x0 + w;
    float y1 = y0 + h;
    float z1 = z0 + d;

    x0 -= g;
    y0 -= g;
    z0 -= g;
    x1 += g;
    y1 += g;
    z1 += g;

    if (modelPart->bMirror) {
        float tmp = x1;
        x1 = x0;
        x0 = tmp;
    }

    Vertex* u0 = new Vertex(x0, y0, z0, 0, 0);
    Vertex* u1 = new Vertex(x1, y0, z0, 0, 8);
    Vertex* u2 = new Vertex(x1, y1, z0, 8, 8);
    Vertex* u3 = new Vertex(x0, y1, z0, 8, 0);

    Vertex* l0 = new Vertex(x0, y0, z1, 0, 0);
    Vertex* l1 = new Vertex(x1, y0, z1, 0, 8);
    Vertex* l2 = new Vertex(x1, y1, z1, 8, 8);
    Vertex* l3 = new Vertex(x0, y1, z1, 8, 0);

    vertices[0] = u0;
    vertices[1] = u1;
    vertices[2] = u2;
    vertices[3] = u3;
    vertices[4] = l0;
    vertices[5] = l1;
    vertices[6] = l2;
    vertices[7] = l3;

    // 4J - added ability to mask individual faces
    int faceCount = 0;
    if (faceMask & 1)
        polygons[faceCount++] =
            new _Polygon(VertexArray4(l1, u1, u2, l2), xTexOffs + d + w,
                         yTexOffs + d, xTexOffs + d + w + d, yTexOffs + d + h,
                         modelPart->xTexSize, modelPart->yTexSize);  // Right
    if (faceMask & 2)
        polygons[faceCount++] =
            new _Polygon(VertexArray4(u0, l0, l3, u3), xTexOffs + 0,
                         yTexOffs + d, xTexOffs + d, yTexOffs + d + h,
                         modelPart->xTexSize, modelPart->yTexSize);  // Left
    if (faceMask & 4)
        polygons[faceCount++] =
            new _Polygon(VertexArray4(l1, l0, u0, u1), xTexOffs + d,
                         yTexOffs + 0, xTexOffs + d + w, yTexOffs + d,
                         modelPart->xTexSize, modelPart->yTexSize);  // Up
    if (bFlipPoly3UVs) {
        if (faceMask & 8)
            polygons[faceCount++] =
                new _Polygon(VertexArray4(u2, u3, l3, l2), xTexOffs + d + w,
                             yTexOffs + 0, xTexOffs + d + w + w, yTexOffs + d,
                             modelPart->xTexSize, modelPart->yTexSize);  // Down
    } else {
        if (faceMask & 8)
            polygons[faceCount++] =
                new _Polygon(VertexArray4(u2, u3, l3, l2), xTexOffs + d + w,
                             yTexOffs + d, xTexOffs + d + w + w, yTexOffs + 0,
                             modelPart->xTexSize, modelPart->yTexSize);  // Down
    }
    if (faceMask & 16)
        polygons[faceCount++] =
            new _Polygon(VertexArray4(u1, u0, u3, u2), xTexOffs + d,
                         yTexOffs + d, xTexOffs + d + w, yTexOffs + d + h,
                         modelPart->xTexSize, modelPart->yTexSize);  // Front
    if (faceMask & 32)
        polygons[faceCount++] = new _Polygon(
            VertexArray4(l0, l1, l2, l3), xTexOffs + d + w + d, yTexOffs + d,
            xTexOffs + d + w + d + w, yTexOffs + d + h, modelPart->xTexSize,
            modelPart->yTexSize);  // Back
    polygons.length = faceCount;

    if (modelPart->bMirror) {
        for (unsigned int i = 0; i < polygons.length; i++)
            polygons[i]->mirror();
    }
}

void Cube::render(Tesselator* t, float scale) {
    for (int i = 0; i < polygons.length; i++) {
        polygons[i]->render(t, scale);
    }
}

Cube* Cube::setId(const std::wstring& id) {
    this->id = id;
    return this;
}