// 生成墙的多边形
private void create_wall_mesh_sub(Mesh mesh, int start, int end, WALL_SIDE side, float height)
{
int point_num = end - start + 1;
// ---------------------------------------------------- //
// 墙的截面形状
Vector3[] wall_vertices;
wall_vertices = new Vector3[4];
wall_vertices[0] = Vector3.zero;
wall_vertices[1] = wall_vertices[0] + Vector3.up * 0.5f;
wall_vertices[2] = wall_vertices[1] + Vector3.right * (1.0f);
wall_vertices[3] = wall_vertices[2] + Vector3.up * height;
// ---------------------------------------------------- //
// 顶点（位置坐标，uv）
// 一个矩形所需要的顶点索引（两个三角形因此是6个）
const int quad_index_num = 6;
Vector3[] vertices = new Vector3[point_num * wall_vertices.Length];
Vector2[] uvs = new Vector2[point_num * wall_vertices.Length];
int[] triangles = new int[(point_num - 1) * wall_vertices.Length * quad_index_num];
Section section;
Vector2 uv;
if (side == WALL_SIDE.LEFT)
{
for (int i = 0; i < point_num; i++)
{
section = this.sections[start + i];
for (int j = 0; j < wall_vertices.Length; j++)
{
vertices[i * wall_vertices.Length + j] = section.positions[0];
vertices[i * wall_vertices.Length + j] += -wall_vertices[j].x * section.right + wall_vertices[j].y * section.up;
//
uv.x = (float)j / (float)(wall_vertices.Length - 1);
uv.y = (float)i * 2.0f + 0.5f;
uvs[i * wall_vertices.Length + j] = uv;
}
}
}
else
{
for (int i = 0; i < point_num; i++)
{
section = this.sections[start + i];
for (int j = 0; j < wall_vertices.Length; j++)
{
vertices[i * wall_vertices.Length + j] = section.positions[1];
vertices[i * wall_vertices.Length + j] += wall_vertices[j].x * section.right + wall_vertices[j].y * section.up;
//
uv.x = (float)j / (float)(wall_vertices.Length - 1);
uv.y = (float)i * 2.0f + 0.5f;
uvs[i * wall_vertices.Length + j] = uv;
}
}
}
// ---------------------------------------------------- //
// 生成三角形（顶点索引数组）
int position_index = 0;
int i00, i10, i01, i11;
if (side == WALL_SIDE.LEFT)
{
for (int i = 0; i < point_num - 1; i++)
{
for (int j = 0; j < wall_vertices.Length - 1; j++)
{
i00 = (i + 1) * wall_vertices.Length + (j + 1); // 左上.
i10 = (i + 1) * wall_vertices.Length + (j + 0); // 右上.
i01 = (i + 0) * wall_vertices.Length + (j + 1); // 左下.
i11 = (i + 0) * wall_vertices.Length + (j + 0); // 右下.
RoadCreator.add_quad_index(triangles, position_index, i00, i10, i01, i11);
position_index += 6;
}
}
}
else
{
for (int i = 0; i < point_num - 1; i++)
{
for (int j = 0; j < wall_vertices.Length - 1; j++)
{
i00 = (i + 1) * wall_vertices.Length + (j + 0); // 左上.
i10 = (i + 1) * wall_vertices.Length + (j + 1); // 右上.
i01 = (i + 0) * wall_vertices.Length + (j + 0); // 左下.
i11 = (i + 0) * wall_vertices.Length + (j + 1); // 右下.
RoadCreator.add_quad_index(triangles, position_index, i00, i10, i01, i11);
position_index += 6;
}
}
}
//
// 由于会出现警告，这里生成uv（适当数值）
mesh.vertices = vertices;
mesh.uv = uvs;
mesh.uv2 = uvs;
mesh.triangles = triangles;
mesh.Optimize();
mesh.RecalculateNormals();
}
// 壁のポリゴンを作る.
private void create_wall_mesh_sub(Mesh mesh, int start, int end, WALL_SIDE side, float height)
{
int point_num = end - start + 1;
// ---------------------------------------------------- //
// 壁の断面形状.
Vector3[] wall_vertices;
wall_vertices = new Vector3[4];
wall_vertices[0] = Vector3.zero;
wall_vertices[1] = wall_vertices[0] + Vector3.up * 0.5f;
wall_vertices[2] = wall_vertices[1] + Vector3.right * (1.0f);
wall_vertices[3] = wall_vertices[2] + Vector3.up * height;
// ---------------------------------------------------- //
// 頂点（位置座標、UV）.
// 四角形ひとつに必要な頂点インデックス（三角形ふたつなので６個）.
const int quad_index_num = 6;
Vector3[] vertices = new Vector3[point_num * wall_vertices.Length];
Vector2[] uvs = new Vector2[point_num * wall_vertices.Length];
int[] triangles = new int[(point_num - 1) * wall_vertices.Length * quad_index_num];
Section section;
Vector2 uv;
if (side == WALL_SIDE.LEFT)
{
for (int i = 0; i < point_num; i++)
{
section = this.sections[start + i];
for (int j = 0; j < wall_vertices.Length; j++)
{
vertices[i * wall_vertices.Length + j] = section.positions[0];
vertices[i * wall_vertices.Length + j] += -wall_vertices[j].x * section.right + wall_vertices[j].y * section.up;
//
uv.x = (float)j / (float)(wall_vertices.Length - 1);
uv.y = (float)i * 2.0f + 0.5f;
uvs[i * wall_vertices.Length + j] = uv;
}
}
}
else
{
for (int i = 0; i < point_num; i++)
{
section = this.sections[start + i];
for (int j = 0; j < wall_vertices.Length; j++)
{
vertices[i * wall_vertices.Length + j] = section.positions[1];
vertices[i * wall_vertices.Length + j] += wall_vertices[j].x * section.right + wall_vertices[j].y * section.up;
//
uv.x = (float)j / (float)(wall_vertices.Length - 1);
uv.y = (float)i * 2.0f + 0.5f;
uvs[i * wall_vertices.Length + j] = uv;
}
}
}
// ---------------------------------------------------- //
// 三角形（頂点インデックスの配列）を作る.
int position_index = 0;
int i00, i10, i01, i11;
if (side == WALL_SIDE.LEFT)
{
for (int i = 0; i < point_num - 1; i++)
{
for (int j = 0; j < wall_vertices.Length - 1; j++)
{
i00 = (i + 1) * wall_vertices.Length + (j + 1); // 左上.
i10 = (i + 1) * wall_vertices.Length + (j + 0); // 右上.
i01 = (i + 0) * wall_vertices.Length + (j + 1); // 左下.
i11 = (i + 0) * wall_vertices.Length + (j + 0); // 右下.
RoadCreator.add_quad_index(triangles, position_index, i00, i10, i01, i11);
position_index += 6;
}
}
}
else
{
for (int i = 0; i < point_num - 1; i++)
{
for (int j = 0; j < wall_vertices.Length - 1; j++)
{
i00 = (i + 1) * wall_vertices.Length + (j + 0); // 左上.
i10 = (i + 1) * wall_vertices.Length + (j + 1); // 右上.
i01 = (i + 0) * wall_vertices.Length + (j + 0); // 左下.
i11 = (i + 0) * wall_vertices.Length + (j + 1); // 右下.
RoadCreator.add_quad_index(triangles, position_index, i00, i10, i01, i11);
position_index += 6;
}
}
}
//
// 警告がでるので、uv も作成しておく（値は適当）.
mesh.vertices = vertices;
mesh.uv = uvs;
mesh.uv2 = uvs;
mesh.triangles = triangles;
mesh.Optimize();
mesh.RecalculateNormals();
}