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-rw-r--r--main.cpp42
-rw-r--r--quadtree.cpp106
-rw-r--r--quadtree.h2
-rw-r--r--video.cpp4
4 files changed, 135 insertions, 19 deletions
diff --git a/main.cpp b/main.cpp
index ae1b471..5f089e8 100644
--- a/main.cpp
+++ b/main.cpp
@@ -72,13 +72,17 @@ int main(int argc, char **argv) {
SDL_Event event;
bool running = true;
bool grid = false;
+ bool terrain = true;
bool gravity = true;
SDL_WarpMouse(video::width/2, video::height/2);
unsigned int last_time = SDL_GetTicks();
+ unsigned int last_update = SDL_GetTicks();
/*boost::timer t;
double last_time = 0;*/
Vector3 selected;
Quadtree::QuadNode *node;
+ Quadtree::QuadNode *last_node = NULL;
+ scene.update();
while(running) {
unsigned int time = SDL_GetTicks();
//double time = t.elapsed();
@@ -86,6 +90,10 @@ int main(int argc, char **argv) {
unsigned int steps = time - last_time + 1;
//double steps = (time - last_time) * 1000;
last_time = time;
+ /*if(time - last_update > 5000) {
+ scene.update();
+ last_update = time;
+ }*/
bool do_select = 0;
int sx, sy;
while(SDL_PollEvent(&event)) {
@@ -101,6 +109,9 @@ int main(int argc, char **argv) {
case SDLK_g:
grid = !grid;
break;
+ case SDLK_t:
+ terrain = !terrain;
+ break;
case SDLK_KP_PLUS:
case SDLK_PLUS:
scene.qt->create_nodes(scene.qt->levels+1);
@@ -127,6 +138,12 @@ int main(int argc, char **argv) {
case SDLK_h:
gravity = !gravity;
break;
+ case SDLK_u:
+ scene.update();
+ break;
+ case SDLK_c:
+ scene.qt->fix_cracks();
+ break;
default:
break;
}
@@ -190,8 +207,9 @@ int main(int argc, char **argv) {
scene.pos.y -= 0.002*steps*(keystate[SDLK_LSHIFT]?10:1);
if(keystate[SDLK_e])
scene.pos.y += 0.002*steps*(keystate[SDLK_LSHIFT]?10:1);
- if(moved && (forward || right))
+ if(moved && (forward || right)) {
scene.move(forward, right, steps*(keystate[SDLK_LSHIFT]?10:1));
+ }
std::string move_str;
Quadtree::QuadNode *node = scene.qt->find(scene.pos.x, scene.pos.z);
@@ -209,18 +227,21 @@ int main(int argc, char **argv) {
}
}
move_str = (boost::format("%s %.2f,%.2f %.2fx%.2f %d") % scene.pos.str() % node->x % node->y % node->width % node->height % node->level).str();
- }
- scene.update();
+ if(last_node != node) {
+ last_node = node;
+ scene.update();
+ }
+ }
scene.lookat();
- glEnable(GL_LIGHTING);
+ //glEnable(GL_LIGHTING);
const float light_pos[4] = {50, 100, 50, 1};
//const float light_pos[4] = {0, 1, 0, 0};
- glLightfv(GL_LIGHT0, GL_POSITION, light_pos);
+ //glLightfv(GL_LIGHT0, GL_POSITION, light_pos);
- if(!grid) {
+ if(terrain) {
program.use();
glBindTexture(GL_TEXTURE_2D, grass_texture);
glEnable(GL_TEXTURE_2D);
@@ -237,7 +258,12 @@ int main(int argc, char **argv) {
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisable(GL_TEXTURE_2D);
glUseProgram(0);
- } else {
+ }
+ if(grid) {
+ if(terrain)
+ glColor3f(0, 0, 0);
+ else
+ glColor3f(1, 1, 1);
std::queue<Quadtree::QuadNode*> q;
q.push(scene.qt->root);
while(!q.empty()) {
@@ -251,7 +277,7 @@ int main(int argc, char **argv) {
}
}
- glDisable(GL_LIGHTING);
+ //glDisable(GL_LIGHTING);
float px, py, pz;
if(do_select && scene.select(sx, sy, px, py, pz)) {
diff --git a/quadtree.cpp b/quadtree.cpp
index b8aee16..782837c 100644
--- a/quadtree.cpp
+++ b/quadtree.cpp
@@ -11,6 +11,7 @@
#include <queue>
using std::min;
+using std::max;
Quadtree::Quadtree(int width, int height, float *heightmap, int levels) {
this->width = width;
@@ -56,7 +57,10 @@ Quadtree::QuadNode::~QuadNode() {
}
float Quadtree::QuadNode::distance(float px, float pz) {
- if(px > x && px < x+width && pz > y && pz < y+height)
+ bool in_width = px > x && px < x+width;
+ bool in_height = pz > y && pz < y+height;
+
+ if(in_width && in_height)
return 0;
Vector2 p(px, pz);
@@ -66,7 +70,14 @@ float Quadtree::QuadNode::distance(float px, float pz) {
float c = (p - Vector2(x, y+height)).length();
float d = (p - Vector2(x+width, y+height)).length();
- return min(min(min(a, b), c), d);
+ float dist = min(min(min(a, b), c), d);
+
+ if(in_width)
+ dist = min(dist, (float)min(abs(y - pz), abs(y+height - pz)));
+ if(in_height)
+ dist = min(dist, (float)min(abs(x - px), abs(x+width - px)));
+
+ return dist;
}
void Quadtree::QuadNode::fill() {
@@ -99,6 +110,58 @@ void Quadtree::QuadNode::fill() {
}
}
+void Quadtree::QuadNode::fix_cracks() {
+ // y = y0 + (x - x0) * (y1 - y0) / (x1 - x0)
+
+ QuadNode *down = tree->get_down(this);
+ if(down && level > down->level) {
+ vertex_array[4] = down->vertex_array[7] +
+ (vertex_array[3] - down->vertex_array[6]) *
+ (down->vertex_array[10] - down->vertex_array[7]) /
+ (down->vertex_array[9] - down->vertex_array[6]);
+ vertex_array[13] = down->vertex_array[7] +
+ (vertex_array[12] - down->vertex_array[6]) *
+ (down->vertex_array[10] - down->vertex_array[7]) /
+ (down->vertex_array[9] - down->vertex_array[6]);
+ }
+
+ QuadNode *up = tree->get_up(this);
+ if(up && level > up->level) {
+ vertex_array[7] = up->vertex_array[4] +
+ (vertex_array[6] - up->vertex_array[3]) *
+ (up->vertex_array[13] - up->vertex_array[4]) /
+ (up->vertex_array[12] - up->vertex_array[3]);
+ vertex_array[10] = up->vertex_array[4] +
+ (vertex_array[9] - up->vertex_array[3]) *
+ (up->vertex_array[13] - up->vertex_array[4]) /
+ (up->vertex_array[12] - up->vertex_array[3]);
+ }
+
+ QuadNode *left = tree->get_left(this);
+ if(left && level > left->level) {
+ vertex_array[10] = left->vertex_array[4] +
+ (vertex_array[11] - left->vertex_array[5]) *
+ (left->vertex_array[7] - left->vertex_array[4]) /
+ (left->vertex_array[8] - left->vertex_array[5]);
+ vertex_array[13] = left->vertex_array[4] +
+ (vertex_array[14] - left->vertex_array[5]) *
+ (left->vertex_array[7] - left->vertex_array[4]) /
+ (left->vertex_array[8] - left->vertex_array[5]);
+ }
+
+ QuadNode *right = tree->get_right(this);
+ if(right && level > right->level) {
+ vertex_array[4] = right->vertex_array[13] +
+ (vertex_array[5] - right->vertex_array[14]) *
+ (right->vertex_array[10] - right->vertex_array[13]) /
+ (right->vertex_array[11] - right->vertex_array[14]);
+ vertex_array[7] = right->vertex_array[13] +
+ (vertex_array[8] - right->vertex_array[14]) *
+ (right->vertex_array[10] - right->vertex_array[13]) /
+ (right->vertex_array[11] - right->vertex_array[14]);
+ }
+}
+
void Quadtree::QuadNode::subdivide(bool leaf) {
if(vertex_array) {
elems = 0;
@@ -247,26 +310,51 @@ Vector3 Quadtree::QuadNode::get_normal(int index) {
}
void Quadtree::update(float x, float z) {
- return;
+ bool changed = false;
+
std::queue<QuadNode*> q;
q.push(root);
while(!q.empty()) {
QuadNode *node = q.front();
q.pop();
float d = node->distance(x, z);
- std::cout << d << std::endl;
- if(d < 20 && node->vertex_array)
+ int l = floorf(sqrtf(100-d+20))+1;
+ if(d < 100 && node->vertex_array && node->level < l) {
node->subdivide();
- else if(d > 50 && !node->vertex_array)
+ changed = true;
+ } else if(!node->vertex_array && node->level > max(l, 6)) {
node->merge();
+ changed = true;
+ }
if(node->vertex_array)
- break;
+ continue;
for(int i = 0; i < 4; i++) {
q.push(node->children[i]);
}
}
- make_vbo();
+ if(changed) {
+ fix_cracks();
+ make_vbo();
+ }
+}
+
+void Quadtree::fix_cracks() {
+ std::queue<QuadNode*> q;
+ q.push(root);
+ while(!q.empty()) {
+ QuadNode *node = q.front();
+ q.pop();
+ if(node->vertex_array) {
+ if(node->vertex_array) delete[] node->vertex_array;
+ node->fill();
+ node->fix_cracks();
+ } else {
+ for(int i = 0; i < 4; i++) {
+ q.push(node->children[i]);
+ }
+ }
+ }
}
void Quadtree::create_nodes(int levels) {
@@ -493,7 +581,7 @@ void Quadtree::make_vbo() {
Quadtree::QuadNode* Quadtree::find(float x, float y, int level) {
QuadNode *node = root;
- while(!node->vertex_array) {
+ while(node && !node->vertex_array) {
if(node->level == level)
return node;
float mx = node->x + node->width / 2;
diff --git a/quadtree.h b/quadtree.h
index 53669d0..951a98e 100644
--- a/quadtree.h
+++ b/quadtree.h
@@ -19,6 +19,7 @@ class Quadtree {
float distance(float px, float pz);
void fill();
+ void fix_cracks();
void subdivide(bool leaf = true);
void merge();
void draw();
@@ -38,6 +39,7 @@ class Quadtree {
virtual ~Quadtree();
void update(float x, float z);
+ void fix_cracks();
void create_nodes(int levels);
unsigned int count_nodes();
void make_vbo();
diff --git a/video.cpp b/video.cpp
index 6ebe170..565a930 100644
--- a/video.cpp
+++ b/video.cpp
@@ -20,8 +20,8 @@ void video::init() {
glShadeModel(GL_SMOOTH);
glEnable(GL_POINT_SMOOTH);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
+ //glEnable(GL_LIGHTING);
+ //glEnable(GL_LIGHT0);
//glEnable(GL_COLOR_MATERIAL);
const float light_ambient[4] = {.2, .2, .2, 1};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 05:19:37 +0100