125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
#define STB_DEFINE
|
|
#include "stb.h"
|
|
#define STB_PG_IMPLEMENTATION
|
|
#include "stb_pg.h"
|
|
#define STB_IMAGE_IMPLEMENTATION
|
|
#include "stb_image.h"
|
|
#define STB_IMAGE_WRITE_IMPLEMENTATION
|
|
#include "stb_image_write.h"
|
|
|
|
static float *hf;
|
|
static int hf_width = 10001;
|
|
static int hf_height = 10001;
|
|
|
|
static float get_height(float x, float y)
|
|
{
|
|
float h00,h01,h10,h11,h0,h1;
|
|
int ix,iy;
|
|
if (x < 0) x = 0;
|
|
if (x > hf_width-1) x = (float) hf_width-1;
|
|
if (y < 0) y = 0;
|
|
if (y > hf_height-1) y = (float) hf_height-1;
|
|
ix = (int) x; x -= ix;
|
|
iy = (int) y; y -= iy;
|
|
h00 = hf[(iy+0)*hf_height+(ix+0)];
|
|
h10 = hf[(iy+0)*hf_height+(ix+1)];
|
|
h01 = hf[(iy+1)*hf_height+(ix+0)];
|
|
h11 = hf[(iy+1)*hf_height+(ix+1)];
|
|
h0 = stb_lerp(y, h00, h01);
|
|
h1 = stb_lerp(y, h10, h11);
|
|
return stb_lerp(x, h0, h1);
|
|
}
|
|
|
|
void stbpg_tick(float dt)
|
|
{
|
|
int i=0,j=0;
|
|
int step = 1;
|
|
|
|
glUseProgram(0);
|
|
|
|
glClearColor(0.6f,0.7f,1.0f,1.0f);
|
|
glClearDepth(1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
glDepthFunc(GL_LESS);
|
|
glEnable(GL_DEPTH_TEST);
|
|
#if 1
|
|
glEnable(GL_CULL_FACE);
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
gluPerspective(60.0, 1920/1080.0f, 0.02f, 8000.0f);
|
|
//glOrtho(-8,8,-6,6, -100, 100);
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
glRotatef(-90, 1,0,0); // z-up
|
|
|
|
{
|
|
float x,y;
|
|
stbpg_get_mouselook(&x,&y);
|
|
glRotatef(-y, 1,0,0);
|
|
glRotatef(-x, 0,0,1);
|
|
}
|
|
|
|
{
|
|
static float cam_x = 1000;
|
|
static float cam_y = 1000;
|
|
static float cam_z = 700;
|
|
float x=0,y=0;
|
|
stbpg_get_keymove(&x,&y);
|
|
cam_x += x*dt*5.0f;
|
|
cam_y += y*dt*5.0f;
|
|
glTranslatef(-cam_x, -cam_y, -cam_z);
|
|
if (cam_x >= 0 && cam_x < hf_width && cam_y >= 0 && cam_y < hf_height)
|
|
cam_z = get_height(cam_x, cam_y) + 1.65f; // average eye height in meters
|
|
}
|
|
|
|
for (j=501; j+1 < 1500+0*hf_height; j += step) {
|
|
glBegin(GL_QUAD_STRIP);
|
|
for (i=501; i < 1500+0*hf_width; i += step) {
|
|
static int flip=0;
|
|
if (flip)
|
|
glColor3f(0.5,0.5,0.5);
|
|
else
|
|
glColor3f(0.4f,0.4f,0.4f);
|
|
flip = !flip;
|
|
glVertex3f((float) i, (float) j+step,hf[(j+step)*hf_width+i]);
|
|
glVertex3f((float) i, (float) j ,hf[ j *hf_width+i]);
|
|
}
|
|
glEnd();
|
|
}
|
|
|
|
glBegin(GL_LINES);
|
|
glColor3f(1,0,0); glVertex3f(10,0,0); glVertex3f(0,0,0);
|
|
glColor3f(0,1,0); glVertex3f(0,10,0); glVertex3f(0,0,0);
|
|
glColor3f(0,0,1); glVertex3f(0,0,10); glVertex3f(0,0,0);
|
|
glEnd();
|
|
#endif
|
|
}
|
|
|
|
void stbpg_main(int argc, char **argv)
|
|
{
|
|
int i,j;
|
|
|
|
#if 0
|
|
int w,h,c;
|
|
unsigned short *data = stbi_load_16("c:/x/ned_1m/test2.png", &w, &h, &c, 1);
|
|
stb_filewrite("c:/x/ned_1m/x73_y428_10012_10012.bin", data, w*h*2);
|
|
#else
|
|
unsigned short *data = stb_file("c:/x/ned_1m/x73_y428_10012_10012.bin", NULL);
|
|
int w=10012, h = 10012;
|
|
#endif
|
|
|
|
hf = malloc(hf_width * hf_height * 4);
|
|
for (j=0; j < hf_height; ++j)
|
|
for (i=0; i < hf_width; ++i)
|
|
hf[j*hf_width+i] = data[j*w+i] / 32.0f;
|
|
|
|
stbpg_gl_compat_version(1,1);
|
|
stbpg_windowed("terrain_edit", 1920, 1080);
|
|
stbpg_run();
|
|
|
|
return;
|
|
}
|