void create_textures()
{
levels = new gcm_level[L];
level_property_block = new MaterialPropertyBlock();
int2 origin = new int2();
origin.x -= M;
origin.y -= M;
for (int i = 0; i < L; ++i)
{
origin.x -= W * (1 << i);
origin.y -= W * (1 << i);
levels[i] = new gcm_level();
levels[i].texture = new RenderTexture(SIZE + 1, SIZE + 1, 0, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Default);
//levels[i].texture.filterMode = FilterMode.Point;
levels[i].scale = 1 << i;
levels[i].origin = origin;
levels[i].material = new Material(level_shader);
levels[i].material.name = "gcm_level_" + i;
levels[i].material.SetFloat("_tex_width", SIZE + 1);
levels[i].material.SetTexture("_MainTex", levels[i].texture);
}
}
void update_clip_map(gcm_level lv)
{
int2 pos = new int2(terrain_offset) + lv.origin;
float start_x = (float)pos.x / (float)heightmap.width;
float start_y = (float)pos.y / (float)heightmap.width;
float texture_width = ((float)SIZE_FPW2 / (float)heightmap.width) * lv.scale;
float texel_width = 1f / (float)heightmap.width;
level_map_material.SetTexture("_MainTex", heightmap);
level_map_material.SetVector("_Input", new Vector4(start_x, start_y, texture_width, texel_width));
Graphics.Blit(heightmap, lv.texture, level_map_material);
}
void draw_center(gcm_level lv)
{
float t = W / SIZE_FPW2;
float texel = 1f / SIZE_FPW2;
// 2 x trim around center
draw_mesh(lv, grid_L[L_XMIN_YMIN], lv.origin.x + W, lv.origin.y + W, t, t);
draw_mesh(lv, grid_L[L_XMAX_YMAX], lv.origin.x + W, lv.origin.y + W, t, t);
// 4 x MxM blocks in center
draw_mesh(lv, grid_MxM, lv.origin.x + M, lv.origin.y + M, t + texel, t + texel);
draw_mesh(lv, grid_MxM, lv.origin.x + M + W, lv.origin.y + M, t + texel + t, t + texel);
draw_mesh(lv, grid_MxM, lv.origin.x + M, lv.origin.y + M + W, t + texel, t + texel + t);
draw_mesh(lv, grid_MxM, lv.origin.x + M + W, lv.origin.y + M + W, t + texel + t, t + texel + t);
}
void OnDrawGizmos()
{
if (levels != null)
{
for (int i = 0; i < L && i < levels.Length; ++i)
{
gcm_level lv = levels[i];
//Gizmos.color = Color.white;
//Gizmos.DrawWireSphere(lv.origin.v3_xz, 0.25f);
//Bounds b = new Bounds();
//b.SetMinMax(lv.min_inner.v3_xz, lv.max_inner.v3_xz);
//Gizmos.color = Color.red;
//Gizmos.DrawWireCube(b.center, b.size);
//Gizmos.DrawLine(b.min - new Vector3(0, 32, 0), b.min + new Vector3(0, 32, 0));
//Gizmos.DrawLine(b.max - new Vector3(0, 32, 0), b.max + new Vector3(0, 32, 0));
//Gizmos.DrawLine(new Vector3(b.min.x, 0, b.max.z) - new Vector3(0, 32, 0), new Vector3(b.min.x, 0, b.max.z) + new Vector3(0, 32, 0));
//Gizmos.DrawLine(new Vector3(b.max.x, 0, b.min.z) - new Vector3(0, 32, 0), new Vector3(b.max.x, 0, b.min.z) + new Vector3(0, 32, 0));
}
}
}
void update_clip_map (gcm_level lv) {
int2 pos = new int2(terrain_offset) + lv.origin;
float start_x = (float)pos.x / (float)heightmap.width;
float start_y = (float)pos.y / (float)heightmap.width;
float texture_width = ((float)SIZE_FPW2 / (float)heightmap.width) * lv.scale;
float texel_width = 1f / (float)heightmap.width;
level_map_material.SetTexture("_MainTex", heightmap);
level_map_material.SetVector("_Input", new Vector4(start_x, start_y, texture_width, texel_width));
Graphics.Blit(heightmap, lv.texture, level_map_material);
}
void draw_center (gcm_level lv) {
float t = W / SIZE_FPW2;
float texel = 1f / SIZE_FPW2;
// 2 x trim around center
draw_mesh(lv, grid_L[L_XMIN_YMIN], lv.origin.x + W, lv.origin.y + W, t, t);
draw_mesh(lv, grid_L[L_XMAX_YMAX], lv.origin.x + W, lv.origin.y + W, t, t);
// 4 x MxM blocks in center
draw_mesh(lv, grid_MxM, lv.origin.x + M, lv.origin.y + M, t + texel, t + texel);
draw_mesh(lv, grid_MxM, lv.origin.x + M + W, lv.origin.y + M, t + texel + t, t + texel);
draw_mesh(lv, grid_MxM, lv.origin.x + M, lv.origin.y + M + W, t + texel, t + texel + t);
draw_mesh(lv, grid_MxM, lv.origin.x + M + W, lv.origin.y + M + W, t + texel + t, t + texel + t);
}
void draw_mesh(gcm_level l, Mesh m, float pos_x, float pos_y, float tex_x, float tex_y) {
Graphics.DrawMesh(m, new Vector4(pos_x, 0, pos_y), Quaternion.identity, l.material, 0, null, 0, get_properties(l.scale, pos_x, pos_y, tex_x, tex_y));
}
void create_textures () {
levels = new gcm_level[L];
level_property_block = new MaterialPropertyBlock();
int2 origin = new int2();
origin.x -= M;
origin.y -= M;
for (int i = 0; i < L; ++i) {
origin.x -= W * (1 << i);
origin.y -= W * (1 << i);
levels[i] = new gcm_level();
levels[i].texture = new RenderTexture(SIZE + 1, SIZE + 1, 0, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Default);
//levels[i].texture.filterMode = FilterMode.Point;
levels[i].scale = 1 << i;
levels[i].origin = origin;
levels[i].material = new Material(level_shader);
levels[i].material.name = "gcm_level_" + i;
levels[i].material.SetFloat("_tex_width", SIZE + 1);
levels[i].material.SetTexture("_MainTex", levels[i].texture);
}
}
void draw_level(int level)
{
gcm_level lv = levels[level];
bool update = false;
if (level > 0)
{
var min = levels[level - 1].min;
var max = levels[level - 1].max;
var min_inner = lv.min_inner;
var max_inner = lv.max_inner;
while (min_inner.x > min.x)
{
lv.origin.x -= lv.scale * 2;
min = levels[level - 1].min;
max = levels[level - 1].max;
min_inner = lv.min_inner;
max_inner = lv.max_inner;
update = true;
}
while (min_inner.y > min.y)
{
lv.origin.y -= lv.scale * 2;
min = levels[level - 1].min;
max = levels[level - 1].max;
min_inner = lv.min_inner;
max_inner = lv.max_inner;
update = true;
}
while (max_inner.x < max.x)
{
lv.origin.x += lv.scale * 2;
min = levels[level - 1].min;
max = levels[level - 1].max;
min_inner = lv.min_inner;
max_inner = lv.max_inner;
update = true;
}
while (max_inner.y < max.y)
{
lv.origin.y += lv.scale * 2;
min = levels[level - 1].min;
max = levels[level - 1].max;
min_inner = lv.min_inner;
max_inner = lv.max_inner;
update = true;
}
}
else
{
while (movement.x >= 2)
{
lv.origin.x -= 2;
movement.x -= 2;
update = true;
}
while (movement.x <= -2)
{
lv.origin.x += 2;
movement.x += 2;
update = true;
}
while (movement.y >= 2)
{
lv.origin.y -= 2;
movement.y -= 2;
update = true;
}
while (movement.y <= -2)
{
lv.origin.y += 2;
movement.y += 2;
update = true;
}
}
int w = W * lv.scale;
int small = 2 * lv.scale;
float t = W / SIZE_FPW2;
float small_t = 2f / SIZE_FPW2;
float right = (SIZE - 1) * lv.scale;
float top = (SIZE - 1) * lv.scale;
float tex_edge = t + t + t + small_t;
if (update)
{
update_clip_map(lv);
}
if (level == 0)
{
draw_center(lv);
}
else
{
var min = levels[level - 1].min;
var max = levels[level - 1].max;
var min_inner = lv.min_inner;
var max_inner = lv.max_inner;
if (min.x == min_inner.x)
{
if (min.y == min_inner.y)
{
draw_mesh(lv, grid_L[L_XMAX_YMAX], lv.origin.x + w, lv.origin.y + w, t, t);
}
else
{
draw_mesh(lv, grid_L[L_XMAX_YMIN], lv.origin.x + w, lv.origin.y + w, t, t);
}
}
else
{
if (min.y == min_inner.y)
{
draw_mesh(lv, grid_L[L_XMIN_YMAX], lv.origin.x + w, lv.origin.y + w, t, t);
}
else
{
draw_mesh(lv, grid_L[L_XMIN_YMIN], lv.origin.x + w, lv.origin.y + w, t, t);
}
}
}
// Bottom
draw_mesh(lv, grid_MxM, lv.origin.x, lv.origin.y, 0, 0);
draw_mesh(lv, grid_MxM, lv.origin.x + w, lv.origin.y, t, 0);
draw_mesh(lv, grid_Mx3, lv.origin.x + w + w, lv.origin.y, t + t, 0);
draw_mesh(lv, grid_MxM, lv.origin.x + w + w + small, lv.origin.y, t + t + small_t, 0);
draw_mesh(lv, grid_MxM, lv.origin.x + w + w + small + w, lv.origin.y, t + t + small_t + t, 0);
// Left
draw_mesh(lv, grid_MxM, lv.origin.x, lv.origin.y + w, 0, t);
draw_mesh(lv, grid_3xM, lv.origin.x, lv.origin.y + w + w, 0, t + t);
draw_mesh(lv, grid_MxM, lv.origin.x, lv.origin.y + w + w + small, 0, t + t + small_t);
// Right
draw_mesh(lv, grid_MxM, lv.origin.x + right - w, lv.origin.y + w, tex_edge, t);
draw_mesh(lv, grid_3xM, lv.origin.x + right - w, lv.origin.y + w + w, tex_edge, t + t);
draw_mesh(lv, grid_MxM, lv.origin.x + right - w, lv.origin.y + w + w + small, tex_edge, t + t + small_t);
// Top
draw_mesh(lv, grid_MxM, lv.origin.x, lv.origin.y + top - w, 0, tex_edge);
draw_mesh(lv, grid_MxM, lv.origin.x + w, lv.origin.y + top - w, t, tex_edge);
draw_mesh(lv, grid_Mx3, lv.origin.x + w + w, lv.origin.y + top - w, t + t, tex_edge);
draw_mesh(lv, grid_MxM, lv.origin.x + w + w + small, lv.origin.y + top - w, t + t + small_t, tex_edge);
draw_mesh(lv, grid_MxM, lv.origin.x + w + w + small + w, lv.origin.y + top - w, t + t + small_t + t, tex_edge);
}
void draw_mesh(gcm_level l, Mesh m, float pos_x, float pos_y, float tex_x, float tex_y)
{
Graphics.DrawMesh(m, new Vector4(pos_x, 0, pos_y), Quaternion.identity, l.material, 0, null, 0, get_properties(l.scale, pos_x, pos_y, tex_x, tex_y));
}