dd0fcedaa4
Separeted demo code into builders. The examples should be easier to follow now. Added scroll wheel support to gui scrolling windows.
666 lines
15 KiB
C++
666 lines
15 KiB
C++
#include <stdio.h>
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#define _USE_MATH_DEFINES
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#include <math.h>
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#ifdef WIN32
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# include <io.h>
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#else
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# include <dirent.h>
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#endif
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#include "SDL.h"
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#include "SDL_Opengl.h"
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#include "GLFont.h"
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#include "imgui.h"
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#include "Recast.h"
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#include "RecastDebugDraw.h"
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#include "MeshLoaderObj.h"
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#include "BuilderStatMeshSimple.h"
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#include "BuilderStatMeshTiling.h"
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GLFont g_font;
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void drawText(int x, int y, int dir, const char* text, unsigned int col)
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{
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if (dir < 0)
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g_font.drawText((float)x - g_font.getTextLength(text), (float)y, text, col);
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else
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g_font.drawText((float)x, (float)y, text, col);
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}
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struct FileList
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{
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static const int MAX_FILES = 256;
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inline FileList() : size(0) {}
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inline ~FileList()
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{
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clear();
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}
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void clear()
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{
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for (int i = 0; i < size; ++i)
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delete [] files[i];
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size = 0;
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}
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void add(const char* path)
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{
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if (size >= MAX_FILES)
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return;
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int n = strlen(path);
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files[size] = new char[n+1];
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strcpy(files[size], path);
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size++;
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}
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static int cmp(const void* a, const void* b)
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{
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return strcmp(*(const char**)a, *(const char**)b);
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}
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void sort()
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{
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if (size > 1)
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qsort(files, size, sizeof(char*), cmp);
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}
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char* files[MAX_FILES];
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int size;
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};
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static void scanDirectory(const char* path, const char* ext, FileList& list)
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{
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list.clear();
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#ifdef WIN32
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_finddata_t dir;
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char pathWithExt[MAX_PATH];
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long fh;
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strcpy(pathWithExt, path);
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strcat(pathWithExt, "/*");
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strcat(pathWithExt, ext);
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fh = _findfirst(pathWithExt, &dir);
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if (fh == -1L)
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return;
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do
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{
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list.add(dir.name);
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}
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while (_findnext(fh, &dir) == 0);
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_findclose(fh);
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#else
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dirent* current = 0;
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DIR* dp = opendir(path);
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if (!dp)
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return;
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while ((current = readdir(dp)) != 0)
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{
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int len = strlen(current->d_name);
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if (len > 4 && strncmp(current->d_name+len-4, ext, 4) == 0)
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{
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list.add(current->d_name);
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}
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}
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closedir(dp);
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#endif
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list.sort();
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}
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bool intersectSegmentTriangle(const float* sp, const float* sq,
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const float* a, const float* b, const float* c,
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float &t)
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{
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float v, w;
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float ab[3], ac[3], qp[3], ap[3], norm[3], e[3];
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vsub(ab, b, a);
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vsub(ac, c, a);
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vsub(qp, sp, sq);
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// Compute triangle normal. Can be precalculated or cached if
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// intersecting multiple segments against the same triangle
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vcross(norm, ab, ac);
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// Compute denominator d. If d <= 0, segment is parallel to or points
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// away from triangle, so exit early
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float d = vdot(qp, norm);
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if (d <= 0.0f) return false;
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// Compute intersection t value of pq with plane of triangle. A ray
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// intersects iff 0 <= t. Segment intersects iff 0 <= t <= 1. Delay
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// dividing by d until intersection has been found to pierce triangle
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vsub(ap, sp, a);
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t = vdot(ap, norm);
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if (t < 0.0f) return false;
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if (t > d) return false; // For segment; exclude this code line for a ray test
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// Compute barycentric coordinate components and test if within bounds
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vcross(e, qp, ap);
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v = vdot(ac, e);
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if (v < 0.0f || v > d) return false;
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w = -vdot(ab, e);
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if (w < 0.0f || v + w > d) return false;
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// Segment/ray intersects triangle. Perform delayed division
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t /= d;
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return true;
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}
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static bool raycast(rcMeshLoaderObj& mesh, float* src, float* dst, float& tmin)
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{
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float dir[3];
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vsub(dir, dst, src);
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int nt = mesh.getTriCount();
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const float* verts = mesh.getVerts();
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const float* normals = mesh.getNormals();
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const int* tris = mesh.getTris();
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tmin = 1.0f;
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bool hit = false;
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for (int i = 0; i < nt*3; i += 3)
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{
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const float* n = &normals[i];
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if (vdot(dir, n) > 0)
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continue;
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float t = 1;
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if (intersectSegmentTriangle(src, dst,
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&verts[tris[i]*3],
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&verts[tris[i+1]*3],
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&verts[tris[i+2]*3], t))
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{
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if (t < tmin)
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tmin = t;
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hit = true;
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}
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}
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return hit;
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}
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int main(int argc, char *argv[])
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{
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// Init SDL
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if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
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{
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printf("Could not initialise SDL\n");
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return -1;
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}
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// Init OpenGL
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SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
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SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
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SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
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SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
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SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
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SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
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int width = 1200;
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int height = 700;
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SDL_Surface* screen = SDL_SetVideoMode(width, height, 0, SDL_OPENGL);
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if (!screen)
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{
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printf("Could not initialise SDL opengl\n");
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return -1;
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}
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SDL_WM_SetCaption("Recast Demo", 0);
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if(!g_font.create("font.cfnt"))
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{
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printf("Could not load font.\n");
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SDL_Quit();
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return -1;
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}
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float t = 0.0f;
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Uint32 lastTime = SDL_GetTicks();
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int mx = 0, my = 0;
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float rx = 45;
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float ry = -45;
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float moveW = 0, moveS = 0, moveA = 0, moveD = 0;
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float camx = 0, camy = 0, camz = 0, camr=10;
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float origrx, origry;
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int origx, origy;
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bool rotate = false;
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float rays[3], raye[3];
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bool mouseOverMenu = false;
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bool showLog = false;
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bool showDebugMode = true;
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bool showTools = true;
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bool showLevels = false;
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bool showBuilder = false;
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int propScroll = 0;
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int logScroll = 0;
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int toolsScroll = 0;
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int debugScroll = 0;
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char builderName[64] = "Choose Builder...";
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FileList meshFiles;
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char meshName[128] = "Choose Mesh...";
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rcMeshLoaderObj* mesh = 0;
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float meshBMin[3], meshBMax[3];
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Builder* builder = 0;
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rcLog log;
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log.clear();
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rcSetLog(&log);
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glEnable(GL_CULL_FACE);
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float fogCol[4] = { 0.32f,0.25f,0.25f,1 };
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glEnable(GL_FOG);
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glFogi(GL_FOG_MODE, GL_LINEAR);
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glFogf(GL_FOG_START, 0);
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glFogf(GL_FOG_END, 10);
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glFogfv(GL_FOG_COLOR, fogCol);
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glEnable(GL_POINT_SMOOTH);
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glEnable(GL_LINE_SMOOTH);
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bool done = false;
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while(!done)
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{
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// Handle input events.
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unsigned char mbut = 0;
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SDL_Event event;
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while(SDL_PollEvent(&event))
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{
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switch(event.type)
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{
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case SDL_KEYDOWN:
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// Handle any key presses here.
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if (event.key.keysym.sym == SDLK_ESCAPE)
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{
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done = true;
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}
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break;
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case SDL_MOUSEBUTTONDOWN:
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// Handle mouse clicks here.
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if (!mouseOverMenu)
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{
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if (event.button.button == SDL_BUTTON_RIGHT)
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{
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// Rotate view
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rotate = true;
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origx = mx;
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origy = my;
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origrx = rx;
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origry = ry;
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}
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else if (event.button.button == SDL_BUTTON_LEFT)
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{
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// Hit test mesh.
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if (mesh && builder)
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{
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// Hit test mesh.
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float t;
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if (raycast(*mesh, rays, raye, t))
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{
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float pos[3];
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pos[0] = rays[0] + (raye[0] - rays[0])*t;
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pos[1] = rays[1] + (raye[1] - rays[1])*t;
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pos[2] = rays[2] + (raye[2] - rays[2])*t;
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if (SDL_GetModState() & KMOD_SHIFT)
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builder->setToolStartPos(pos);
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else
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builder->setToolEndPos(pos);
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}
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}
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}
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}
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if (event.button.button == SDL_BUTTON_WHEELUP)
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mbut |= IMGUI_MBUT_UP;
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if (event.button.button == SDL_BUTTON_WHEELDOWN)
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mbut |= IMGUI_MBUT_DOWN;
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break;
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case SDL_MOUSEBUTTONUP:
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// Handle mouse clicks here.
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if(event.button.button == SDL_BUTTON_RIGHT)
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{
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rotate = false;
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}
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break;
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case SDL_MOUSEMOTION:
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mx = event.motion.x;
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my = height-1 - event.motion.y;
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if (rotate)
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{
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int dx = mx - origx;
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int dy = my - origy;
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rx = origrx - dy*0.25f;
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ry = origry + dx*0.25f;
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}
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break;
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case SDL_QUIT:
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done = true;
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break;
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default:
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break;
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}
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}
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if (SDL_GetMouseState(0,0) & SDL_BUTTON_LMASK)
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mbut |= IMGUI_MBUT_LEFT;
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if (SDL_GetMouseState(0,0) & SDL_BUTTON_RMASK)
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mbut |= IMGUI_MBUT_RIGHT;
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Uint32 time = SDL_GetTicks();
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float dt = (time - lastTime) / 1000.0f;
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lastTime = time;
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t += dt;
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// Update and render
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glViewport(0, 0, width, height);
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glClearColor(0.3f, 0.3f, 0.32f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glDisable(GL_TEXTURE_2D);
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// Render 3d
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glEnable(GL_DEPTH_TEST);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(50.0f, (float)width/(float)height, 1.0f, camr);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glRotatef(rx,1,0,0);
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glRotatef(ry,0,1,0);
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glTranslatef(-camx, -camy, -camz);
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// Get hit ray position and direction.
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GLdouble proj[16];
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GLdouble model[16];
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GLint view[4];
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glGetDoublev(GL_PROJECTION_MATRIX, proj);
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glGetDoublev(GL_MODELVIEW_MATRIX, model);
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glGetIntegerv(GL_VIEWPORT, view);
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GLdouble x, y, z;
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gluUnProject(mx, my, 0.0f, model, proj, view, &x, &y, &z);
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rays[0] = (float)x; rays[1] = (float)y; rays[2] = (float)z;
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gluUnProject(mx, my, 1.0f, model, proj, view, &x, &y, &z);
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raye[0] = (float)x; raye[1] = (float)y; raye[2] = (float)z;
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// Handle keyboard movement.
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Uint8* keystate = SDL_GetKeyState(NULL);
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moveW = rcClamp(moveW + dt * 4 * (keystate[SDLK_w] ? 1 : -1), 0.0f, 1.0f);
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moveS = rcClamp(moveS + dt * 4 * (keystate[SDLK_s] ? 1 : -1), 0.0f, 1.0f);
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moveA = rcClamp(moveA + dt * 4 * (keystate[SDLK_a] ? 1 : -1), 0.0f, 1.0f);
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moveD = rcClamp(moveD + dt * 4 * (keystate[SDLK_d] ? 1 : -1), 0.0f, 1.0f);
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float keybSpeed = 22.0f;
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if (SDL_GetModState() & KMOD_SHIFT)
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keybSpeed *= 4.0f;
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float movex = (moveD - moveA) * keybSpeed * dt;
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float movey = (moveS - moveW) * keybSpeed * dt;
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camx += movex * (float)model[0];
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camy += movex * (float)model[4];
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camz += movex * (float)model[8];
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camx += movey * (float)model[2];
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camy += movey * (float)model[6];
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camz += movey * (float)model[10];
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glEnable(GL_FOG);
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if (builder)
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builder->handleRender();
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glDisable(GL_FOG);
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// Render GUI
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glDisable(GL_DEPTH_TEST);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluOrtho2D(0, width, 0, height);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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imguiBeginFrame(mx,my,mbut);
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mouseOverMenu = false;
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int propDiv = showDebugMode ? height*0.6f : height;
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if (imguiBeginScrollArea(GENID, "Properties",
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width-250-10, 10+height-propDiv, 250, propDiv-20, &propScroll))
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mouseOverMenu = true;
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if (imguiCheck(GENID, "Show Log", showLog))
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showLog = !showLog;
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if (imguiCheck(GENID, "Show Tools", showTools))
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showTools = !showTools;
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if (imguiCheck(GENID, "Show Debug Mode", showDebugMode))
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showDebugMode = !showDebugMode;
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imguiSeparator();
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imguiLabel(GENID, "Builder");
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if (imguiButton(GENID, builderName))
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{
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if (showBuilder)
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{
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showBuilder = false;
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}
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else
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{
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showBuilder = true;
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showLevels = false;
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}
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}
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if (builder)
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{
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imguiSeparator();
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imguiLabel(GENID, "Input Mesh");
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if (imguiButton(GENID, meshName))
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{
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if (showLevels)
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{
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showLevels = false;
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}
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else
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{
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showBuilder = false;
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showLevels = true;
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scanDirectory("meshes", ".obj", meshFiles);
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}
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}
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if (mesh)
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{
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char text[64];
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snprintf(text, 64, "Verts: %.1fk Tris: %.1fk", mesh->getVertCount()/1000.0f, mesh->getTriCount()/1000.0f);
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imguiValue(GENID, text);
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}
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imguiSeparator();
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}
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if (mesh && builder)
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{
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builder->handleSettings();
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if (imguiButton(GENID, "Build"))
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{
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log.clear();
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if (!builder->handleBuild())
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{
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showLog = true;
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logScroll = 0;
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}
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}
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imguiSeparator();
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}
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imguiEndScrollArea();
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if (showDebugMode)
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{
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if (imguiBeginScrollArea(GENID, "Debug Mode",
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width-250-10, 10,
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250, height-propDiv-10, &debugScroll))
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mouseOverMenu = true;
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if (builder)
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builder->handleDebugMode();
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imguiEndScrollArea();
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}
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// Builder selection dialog.
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if (showBuilder)
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{
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static int levelScroll = 0;
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if (imguiBeginScrollArea(GENID, "Choose Level", width-10-250-10-200, height-10-250, 200, 250, &levelScroll))
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mouseOverMenu = true;
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Builder* newBuilder = 0;
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if (imguiItem(GENID, "Simple Static Mesh"))
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{
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newBuilder = new BuilderStatMeshSimple();
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if (newBuilder) strcpy(builderName, "Simple Static Mesh");
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}
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if (imguiItem(GENID, "Tiling Static Mesh"))
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{
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newBuilder = new BuilderStatMeshTiling();
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if (newBuilder) strcpy(builderName, "Tiling Static Mesh");
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}
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if (newBuilder)
|
|
{
|
|
delete builder;
|
|
builder = newBuilder;
|
|
if (mesh && builder)
|
|
{
|
|
builder->handleMeshChanged(mesh->getVerts(), mesh->getVertCount(),
|
|
mesh->getTris(), mesh->getNormals(), mesh->getTriCount(),
|
|
meshBMin, meshBMax);
|
|
}
|
|
showBuilder = false;
|
|
}
|
|
|
|
imguiEndScrollArea();
|
|
}
|
|
|
|
// Level selection dialog.
|
|
if (showLevels)
|
|
{
|
|
static int levelScroll = 0;
|
|
if (imguiBeginScrollArea(GENID, "Choose Level", width-10-250-10-200, height-10-250, 200, 250, &levelScroll))
|
|
mouseOverMenu = true;
|
|
|
|
int levelToLoad = -1;
|
|
for (int i = 0; i < meshFiles.size; ++i)
|
|
{
|
|
if (imguiItem(GENID1(i), meshFiles.files[i]))
|
|
levelToLoad = i;
|
|
}
|
|
|
|
if (levelToLoad != -1)
|
|
{
|
|
strncpy(meshName, meshFiles.files[levelToLoad], sizeof(meshName));
|
|
meshName[sizeof(meshName)-1] = '\0';
|
|
showLevels = false;
|
|
|
|
delete mesh;
|
|
mesh = 0;
|
|
|
|
char path[256];
|
|
strcpy(path, "meshes/");
|
|
strcat(path, meshName);
|
|
|
|
mesh = new rcMeshLoaderObj;
|
|
if (!mesh || !mesh->load(path))
|
|
{
|
|
delete mesh;
|
|
mesh = 0;
|
|
}
|
|
|
|
if (mesh)
|
|
rcCalcBounds(mesh->getVerts(), mesh->getVertCount(), meshBMin, meshBMax);
|
|
|
|
if (builder)
|
|
{
|
|
builder->handleMeshChanged(mesh->getVerts(), mesh->getVertCount(),
|
|
mesh->getTris(), mesh->getNormals(), mesh->getTriCount(),
|
|
meshBMin, meshBMax);
|
|
}
|
|
|
|
// Reset camera and fog to match the mesh bounds.
|
|
camr = sqrtf(rcSqr(meshBMax[0]-meshBMin[0]) +
|
|
rcSqr(meshBMax[1]-meshBMin[1]) +
|
|
rcSqr(meshBMax[2]-meshBMin[2])) / 2;
|
|
camx = (meshBMax[0] + meshBMin[0]) / 2 + camr;
|
|
camy = (meshBMax[1] + meshBMin[1]) / 2 + camr;
|
|
camz = (meshBMax[2] + meshBMin[2]) / 2 + camr;
|
|
camr *= 3;
|
|
rx = 45;
|
|
ry = -45;
|
|
glFogf(GL_FOG_START, camr*0.2f);
|
|
glFogf(GL_FOG_END, camr*1.25f);
|
|
}
|
|
|
|
imguiEndScrollArea();
|
|
|
|
}
|
|
|
|
// Log
|
|
if (showLog)
|
|
{
|
|
if (imguiBeginScrollArea(GENID, "Log", 10, 10, width - 300, 200, &logScroll))
|
|
mouseOverMenu = true;
|
|
for (int i = 0; i < log.getMessageCount(); ++i)
|
|
imguiLabel(GENID1(i), log.getMessageText(i));
|
|
imguiEndScrollArea();
|
|
}
|
|
|
|
// Tools
|
|
if (showTools && mesh && builder)
|
|
{
|
|
if (imguiBeginScrollArea(GENID, "Tools", 10, height - 10 - 200, 150, 200, &toolsScroll))
|
|
mouseOverMenu = true;
|
|
|
|
builder->handleTools();
|
|
|
|
imguiEndScrollArea();
|
|
}
|
|
|
|
// Help text.
|
|
const char msg[] = "W/S/A/D: Move RMB: Rotate LMB: Place Start LMB+SHIFT: Place End";
|
|
const float len = g_font.getTextLength(msg);
|
|
g_font.drawText(width/2-len/2, (float)height-20.0f, msg, GLFont::RGBA(255,255,255,128));
|
|
|
|
glDisable(GL_TEXTURE_2D);
|
|
|
|
imguiEndFrame();
|
|
imguiRender(&drawText);
|
|
|
|
glEnable(GL_DEPTH_TEST);
|
|
SDL_GL_SwapBuffers();
|
|
}
|
|
|
|
SDL_Quit();
|
|
|
|
delete builder;
|
|
delete mesh;
|
|
|
|
return 0;
|
|
}
|