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xheightmap.c
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xheightmap.c
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/**
* This file belongs to the 'xlab' game engine.
* Copyright 2009 xfacter
* Copyright 2016 wickles
* This work is licensed under the LGPLv3
* subject to all terms as reproduced in the included LICENSE file.
*/
#include <stdio.h>
#include <math.h>
#include <pspgu.h>
#include <pspgum.h>
#include "xmem.h"
#include "xmath.h"
#include "xgraphics.h"
#include "xheightmap.h"
#define LIST_SIZE 512
//#define FRUSTUM_CULL
#define DRAW_PRIM GU_TRIANGLE_STRIP
#define FLOAT_TO_S16(x) ((s16)(32767*(x)))
int xHeightmapLoad(xHeightmap* h, char* filename, int width, float tile_scale, float zscale)
{
if (!h) return 1;
int height = width;
h->width = width;
h->height = width;
h->tile_scale = tile_scale;
h->z_scale = zscale;
FILE* file = fopen(filename, "r");
if (!file) return 1;
h->vertices = (hmap_vertex*)x_malloc(width*height*sizeof(hmap_vertex));
h->indices_static = (u16*)x_malloc(2*width*sizeof(u16));
if (!h->vertices || !h->indices_static)
{
fclose(file);
xHeightmapFree(h);
return 1;
}
u16 temp_height = 0;
int x, y;
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
fread(&temp_height, 2, 1, file);
h->vertices[y*width+x].u = FLOAT_TO_S16((float)x/(width-1));
h->vertices[y*width+x].v = FLOAT_TO_S16((float)y/(height-1));
h->vertices[y*width+x].p.x = tile_scale * x;
h->vertices[y*width+x].p.y = tile_scale * y;
h->vertices[y*width+x].p.z = zscale * (temp_height/65535.0f);
}
}
int i;
for (i = 0; i < 2*width; i++)
{
//goes from 1 row up, 1 row down, right 1, 1 row up, 1 row down, etc
h->indices_static[i] = (1 - i%2)*width + i/2;
}
X_LOG("heightmap: %i, %i, %f", h->width, h->height, h->tile_scale);
sceKernelDcacheWritebackAll();
fclose(file);
return 0;
}
void xHeightmapFree(xHeightmap* h)
{
if (!h) return;
if (h->vertices)
{
x_free(h->vertices);
h->vertices = 0;
}
if (h->indices_static)
{
x_free(h->indices_static);
h->indices_static = 0;
}
}
int xHeightmapSetupLOD(xHeightmapLOD* l, xHeightmap* h, int min_level)
{
l->h = h;
l->patches = 1 << min_level;
l->patch_width = (h->width-1)/l->patches;
l->indices_buffer = (u16*)x_malloc((2*h->width*(h->width-1) + 8*l->patches*l->patches)*sizeof(u16));
l->list_buffer = x_malloc(l->patches*l->patches*LIST_SIZE);
l->list_ptrs = (void**)x_malloc(l->patches*l->patches*sizeof(void*));
l->bboxes = (hmap_bbox*)x_malloc(l->patches*l->patches*sizeof(hmap_bbox));
l->ready = 0;
if (!l->indices_buffer || !l->list_buffer || !l->list_ptrs || !l->bboxes)
{
xHeightmapFreeLOD(l);
return 1;
}
int x0, y0, x, y;
int index = 0;
for (y0 = 0; y0 < l->patches; y0++)
{
for (x0 = 0; x0 < l->patches; x0++)
{
//initialize to opposite extremities
ScePspFVector3 min = {HUGE_VAL, HUGE_VAL, HUGE_VAL};
ScePspFVector3 max = {-HUGE_VAL, -HUGE_VAL, -HUGE_VAL};
for (y = 0; y < l->patch_width+1; y++)
{
for (x = 0; x < l->patch_width+1; x++)
{
ScePspFVector3* vert = &l->h->vertices[y0*l->patch_width*l->h->width + y*l->h->width + x0*l->patch_width + x].p;
if (vert->x < min.x) min.x = vert->x;
if (vert->x > max.x) max.x = vert->x;
if (vert->y < min.y) min.y = vert->y;
if (vert->y > max.y) max.y = vert->y;
if (vert->z < min.z) min.z = vert->z;
if (vert->z > max.z) max.z = vert->z;
}
}
l->bboxes[index].p[0].x = min.x; l->bboxes[index].p[0].y = min.y; l->bboxes[index].p[0].z = min.z;
l->bboxes[index].p[1].x = max.x; l->bboxes[index].p[1].y = min.y; l->bboxes[index].p[1].z = min.z;
l->bboxes[index].p[2].x = min.x; l->bboxes[index].p[2].y = max.y; l->bboxes[index].p[2].z = min.z;
l->bboxes[index].p[3].x = min.x; l->bboxes[index].p[3].y = min.y; l->bboxes[index].p[3].z = max.z;
l->bboxes[index].p[4].x = max.x; l->bboxes[index].p[4].y = max.y; l->bboxes[index].p[4].z = min.z;
l->bboxes[index].p[5].x = min.x; l->bboxes[index].p[5].y = max.y; l->bboxes[index].p[5].z = max.z;
l->bboxes[index].p[6].x = max.x; l->bboxes[index].p[6].y = min.y; l->bboxes[index].p[6].z = max.z;
l->bboxes[index].p[7].x = max.x; l->bboxes[index].p[7].y = max.y; l->bboxes[index].p[7].z = max.z;
index += 1;
}
}
return 0;
}
void xHeightmapFreeLOD(xHeightmapLOD* l)
{
if (!l) return;
if (l->indices_buffer)
{
x_free(l->indices_buffer);
l->indices_buffer = 0;
}
if (l->list_buffer)
{
x_free(l->list_buffer);
l->list_buffer = 0;
}
if (l->list_ptrs)
{
x_free(l->list_ptrs);
l->list_ptrs = 0;
}
if (l->bboxes)
{
x_free(l->bboxes);
l->bboxes = 0;
}
}
ScePspFVector3* point_from_grid(xHeightmap* h, int x, int y)
{
return &h->vertices[y*h->width + x].p;
}
//which - bottom right (0) or top left (1)
void normal_from_grid(xHeightmap* h, ScePspFVector3* out, int x, int y, int which)
{
if (!h) return;
if (!h->vertices) return;
if (which)
x_normal(out, point_from_grid(h, x, y), point_from_grid(h, x, y+1), point_from_grid(h, x+1, y+1));
else
x_normal(out, point_from_grid(h, x, y), point_from_grid(h, x+1, y+1), point_from_grid(h, x+1, y));
}
void xHeightmapGetNormal(xHeightmap* h, ScePspFVector3* out, float x, float y)
{
if (!h) return;
if (!h->vertices) return;
int height = h->width;
float inv_scale = 1.0f/h->tile_scale;
float gridx = x*inv_scale;
float gridy = y*inv_scale;
if (gridx < 0.0f || gridx >= h->width-1 || gridy < 0.0f || gridy >= height-1)
{
out->x = 0.0f;
out->y = 0.0f;
out->z = 1.0f;
}
else
normal_from_grid(h, out, (int)gridx, (int)gridy, (gridy - (int)gridy > gridx - (int)gridx));
}
float xHeightmapGetHeight(xHeightmap* h, ScePspFVector3* normal, float x, float y)
{
if (!h) return 0.0f;
if (!h->vertices) return 0.0f;
int height = h->width;
float inv_scale = 1.0f/h->tile_scale;
float gridx = x*inv_scale;
float gridy = y*inv_scale;
if (gridx < 0.0f || gridx >= h->width-1 || gridy < 0.0f || gridy >= height-1)
{
if (normal)
{
normal->x = 0.0f;
normal->y = 0.0f;
normal->z = 1.0f;
}
return 0.0f;
}
ScePspFVector3 n;
normal_from_grid(h, &n, (int)gridx, (int)gridy, (gridy - (int)gridy > gridx - (int)gridx));
if (normal)
*normal = n;
ScePspFVector3* p = point_from_grid(h, (int)gridx, (int)gridy);
return (n.x*(x - p->x) + n.y*(y - p->y))/-n.z + p->z;
}
void xHeightmapDraw(xHeightmap* h)
{
if (!h) return;
if (!h->vertices) return;
int height = h->width;
xGuSaveStates();
//sceGuDisable(GU_BLEND);
sceGuDisable(GU_LIGHTING);
sceGuFrontFace(GU_CCW);
hmap_vertex* vertices = h->vertices;
int i;
for (i = 0; i < height-1; i++)
{
sceGumDrawArray(DRAW_PRIM, GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D, 2*h->width, h->indices_static, vertices);
vertices += h->width;
}
sceGuFrontFace(GU_CW);
xGuLoadStates();
}
static int subdivisions(float dist_sq, float start, float spacing, int patch_width)
{
if (dist_sq < SQR(start))
return 0;
int r = 1;
while (SQR(start + r*spacing) < dist_sq && patch_width/(1<<r) > 1)
r += 1;
return r;
}
//#define FRUSTUM_CULL
#define INDEX_H(h,x,y) ((y)*h->width + (x))
void xHeightmapBuildLOD(xHeightmapLOD* l, ScePspFVector3* p, float start, float spacing)
{
if (!l) return;
if (!l->h) return;
if (!l->indices_buffer || !l->list_buffer || !l->h->vertices) return;
xHeightmap* h = l->h;
int patches = l->patches;
int patch_width = l->patch_width;
float dist_sq;
s16 lod_width;
int num_tiles;
ScePspFVector3* center;
s16 subdiv[5]; //center, up, right, down, left
s16 length;
hmap_vertex* vertices;
u16* indices = (u16*)X_UNCACHED(l->indices_buffer);
void* list = l->list_buffer;
int x, y, i, j;
int index = 0;
for (y = 0; y < patches*patch_width; y += patch_width)
{
for (x = 0; x < patches*patch_width; x += patch_width)
{
sceGuStart(GU_CALL, list);
sceGuBeginObject(GU_VERTEX_32BITF, 8, 0, &l->bboxes[index]);
center = point_from_grid(h, x + patch_width/2, y + patch_width/2);
dist_sq = SQR(center->x - p->x) + SQR(center->y - p->y);
if (dist_sq < SQR(start))
{
for (i = 0; i < patch_width; i++)
{
vertices = h->vertices + INDEX_H(h, x, y+i);
sceGuDrawArray(DRAW_PRIM, GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D, 2*(patch_width+1), h->indices_static, vertices);
}
}
else
{
subdiv[0] = subdivisions(dist_sq, start, spacing, patch_width);
//up
if (y/patch_width >= patches-1)
subdiv[1] = subdiv[0];
else
{
center = point_from_grid(h, x + patch_width/2, y + 3*patch_width/2);
subdiv[1] = subdivisions(SQR(center->x - p->x) + SQR(center->y - p->y), start, spacing, patch_width);
}
//right
if (x/patch_width >= patches-1)
subdiv[2] = subdiv[0];
else
{
center = point_from_grid(h, x + 3*patch_width/2, y + patch_width/2);
subdiv[2] = subdivisions(SQR(center->x - p->x) + SQR(center->y - p->y), start, spacing, patch_width);
}
//down
if (y/patch_width <= 0)
subdiv[3] = subdiv[0];
else
{
center = point_from_grid(h, x + patch_width/2, y - patch_width/2);
subdiv[3] = subdivisions(SQR(center->x - p->x) + SQR(center->y - p->y), start, spacing, patch_width);
}
//left
if (x/patch_width <= 0)
subdiv[4] = subdiv[0];
else
{
center = point_from_grid(h, x - patch_width/2, y + patch_width/2);
subdiv[4] = subdivisions(SQR(center->x - p->x) + SQR(center->y - p->y), start, spacing, patch_width);
}
//number of base tiles in one LOD tile
num_tiles = 1 << subdiv[0];
//number of LOD tiles in one square
lod_width = patch_width / num_tiles;
if (lod_width == 1 && (subdiv[0] > subdiv[1] || subdiv[0] > subdiv[2] || subdiv[0] > subdiv[3] || subdiv[0] > subdiv[4]))
{
indices[0] = INDEX_H(h, patch_width/2, patch_width/2);
j = 1;
for (i = 0; i < 1<<(subdiv[0]-subdiv[1]); i++)
{
indices[j] = INDEX_H(h, patch_width - i*patch_width/(1<<(subdiv[0]-subdiv[1])), patch_width);
j += 1;
}
for (i = 0; i < 1<<(subdiv[0]-subdiv[4]); i++)
{
indices[j] = INDEX_H(h, 0, patch_width - i*patch_width/(1<<(subdiv[0]-subdiv[4])));
j += 1;
}
for (i = 0; i < 1<<(subdiv[0]-subdiv[3]); i++)
{
indices[j] = INDEX_H(h, i*patch_width/(1<<(subdiv[0]-subdiv[3])), 0);
j += 1;
}
for (i = 0; i < 1<<(subdiv[0]-subdiv[2]); i++)
{
indices[j] = INDEX_H(h, patch_width, i*patch_width/(1<<(subdiv[0]-subdiv[2])));
j += 1;
}
indices[j] = INDEX_H(h, patch_width, patch_width);
vertices = h->vertices + INDEX_H(h, x, y);
sceGuDrawArray((DRAW_PRIM == GU_TRIANGLE_STRIP ? GU_TRIANGLE_FAN : DRAW_PRIM),
GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D,
(1<<(subdiv[0]-subdiv[1])) + (1<<(subdiv[0]-subdiv[2])) + (1<<(subdiv[0]-subdiv[3])) + (1<<(subdiv[0]-subdiv[4])) + 2,
indices, vertices);
indices += (1<<(subdiv[0]-subdiv[1])) + (1<<(subdiv[0]-subdiv[2])) + (1<<(subdiv[0]-subdiv[3])) + (1<<(subdiv[0]-subdiv[4])) + 2;
}
else
{
for (i = 0; i < 2*(lod_width+1); i++)
{
//setup indices
indices[i] = INDEX_H(h, (i/2)*num_tiles, num_tiles - (i%2)*num_tiles);
}
//draw the inner grid, avoiding sections containing seams
for (i = (subdiv[0] > subdiv[3] ? 1 : 0); i < (subdiv[0] > subdiv[1] ? lod_width-1 : lod_width); i++)
{
vertices = h->vertices + INDEX_H(h, x, y+i*num_tiles);
length = lod_width+1;
if (subdiv[0] > subdiv[4])
{
vertices += num_tiles;
length -= 1;
}
if (subdiv[0] > subdiv[2])
length -= 1;
sceGuDrawArray(DRAW_PRIM, GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D, 2*length, indices, vertices);
}
indices += 2*(lod_width+1);
//draw sections containing seams as triangle fans
//up
if (subdiv[0] > subdiv[1])
{
indices[0] = INDEX_H(h, num_tiles, 0);
j = 1;
for (i = 0; i < 1<<(subdiv[0]-subdiv[1]); i++)
{
indices[j] = INDEX_H(h, num_tiles - i*num_tiles/(1<<(subdiv[0]-subdiv[1])), num_tiles);
j += 1;
}
indices[j] = INDEX_H(h, 0, num_tiles);
indices[j+1] = INDEX_H(h, 0, 0);
for (i = 0; i < lod_width; i++)
{
if (!((i == 0 && subdiv[0] > subdiv[4]) || (i == lod_width-1 && subdiv[0] > subdiv[2])))
{
vertices = h->vertices + INDEX_H(h, x + i*num_tiles, y + patch_width-num_tiles);
sceGuDrawArray((DRAW_PRIM == GU_TRIANGLE_STRIP ? GU_TRIANGLE_FAN : DRAW_PRIM),
GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D,
(1<<(subdiv[0]-subdiv[1])) + 3, indices, vertices);
}
}
indices += (1<<(subdiv[0]-subdiv[1])) + 3;
}
//right
if (subdiv[0] > subdiv[2])
{
indices[0] = INDEX_H(h, 0, 0);
j = 1;
for (i = 0; i < 1<<(subdiv[0]-subdiv[2]); i++)
{
indices[j] = INDEX_H(h, num_tiles, i*num_tiles/(1<<(subdiv[0]-subdiv[2])));
j += 1;
}
indices[j] = INDEX_H(h, num_tiles, num_tiles);
indices[j+1] = INDEX_H(h, 0, num_tiles);
for (i = 0; i < lod_width; i++)
{
if (!((i == 0 && subdiv[0] > subdiv[3]) || (i == lod_width-1 && subdiv[0] > subdiv[1])))
{
vertices = h->vertices + INDEX_H(h, x + patch_width-num_tiles, y + i*num_tiles);
sceGuDrawArray((DRAW_PRIM == GU_TRIANGLE_STRIP ? GU_TRIANGLE_FAN : DRAW_PRIM),
GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D,
(1<<(subdiv[0]-subdiv[2])) + 3, indices, vertices);
}
}
indices += (1<<(subdiv[0]-subdiv[2])) + 3;
}
//down
if (subdiv[0] > subdiv[3])
{
indices[0] = INDEX_H(h, 0, num_tiles);
j = 1;
for (i = 0; i < 1<<(subdiv[0]-subdiv[3]); i++)
{
indices[j] = INDEX_H(h, i*num_tiles/(1<<(subdiv[0]-subdiv[3])), 0);
j += 1;
}
indices[j] = INDEX_H(h, num_tiles, 0);
indices[j+1] = INDEX_H(h, num_tiles, num_tiles);
for (i = 0; i < lod_width; i++)
{
if (!((i == 0 && subdiv[0] > subdiv[4]) || (i == lod_width-1 && subdiv[0] > subdiv[2])))
{
vertices = h->vertices + INDEX_H(h, x + i*num_tiles, y);
sceGuDrawArray((DRAW_PRIM == GU_TRIANGLE_STRIP ? GU_TRIANGLE_FAN : DRAW_PRIM),
GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D,
(1<<(subdiv[0]-subdiv[3])) + 3, indices, vertices);
}
}
indices += (1<<(subdiv[0]-subdiv[3])) + 3;
}
//left
if (subdiv[0] > subdiv[4])
{
indices[0] = INDEX_H(h, num_tiles, num_tiles);
j = 1;
for (i = 0; i < 1<<(subdiv[0]-subdiv[4]); i++)
{
indices[j] = INDEX_H(h, 0, num_tiles - i*num_tiles/(1<<(subdiv[0]-subdiv[4])));
j += 1;
}
indices[j] = INDEX_H(h, 0, 0);
indices[j+1] = INDEX_H(h, num_tiles, 0);
for (i = 0; i < lod_width; i++)
{
if (!((i == 0 && subdiv[0] > subdiv[3]) || (i == lod_width-1 && subdiv[0] > subdiv[1])))
{
vertices = h->vertices + INDEX_H(h, x, y + i*num_tiles);
sceGuDrawArray((DRAW_PRIM == GU_TRIANGLE_STRIP ? GU_TRIANGLE_FAN : DRAW_PRIM),
GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D,
(1<<(subdiv[0]-subdiv[4])) + 3, indices, vertices);
}
}
indices += (1<<(subdiv[0]-subdiv[4])) + 3;
}
//last "corner" fans here...
if (subdiv[0] > subdiv[2])
{
//top right
if (subdiv[0] > subdiv[1])
{
indices[0] = INDEX_H(h, 0, 0);
j = 1;
for (i = 0; i < 1<<(subdiv[0]-subdiv[2]); i++)
{
indices[j] = INDEX_H(h, num_tiles, i*num_tiles/(1<<(subdiv[0]-subdiv[2])));
j += 1;
}
for (i = 0; i < 1<<(subdiv[0]-subdiv[1]); i++)
{
indices[j] = INDEX_H(h, num_tiles - i*num_tiles/(1<<(subdiv[0]-subdiv[1])), num_tiles);
j += 1;
}
indices[j] = INDEX_H(h, 0, num_tiles);
vertices = h->vertices + INDEX_H(h, x + (lod_width-1)*num_tiles, y + (lod_width-1)*num_tiles);
sceGuDrawArray((DRAW_PRIM == GU_TRIANGLE_STRIP ? GU_TRIANGLE_FAN : DRAW_PRIM),
GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D,
(1<<(subdiv[0]-subdiv[2])) + (1<<(subdiv[0]-subdiv[1])) + 2, indices, vertices);
indices += (1<<(subdiv[0]-subdiv[2])) + (1<<(subdiv[0]-subdiv[1])) + 2;
}
//bottom right
if (subdiv[0] > subdiv[3])
{
indices[0] = INDEX_H(h, 0, num_tiles);
j = 1;
for (i = 0; i < 1<<(subdiv[0]-subdiv[3]); i++)
{
indices[j] = INDEX_H(h, i*num_tiles/(1<<(subdiv[0]-subdiv[3])), 0);
j += 1;
}
for (i = 0; i < 1<<(subdiv[0]-subdiv[2]); i++)
{
indices[j] = INDEX_H(h, num_tiles, i*num_tiles/(1<<(subdiv[0]-subdiv[2])));
j += 1;
}
indices[j] = INDEX_H(h, num_tiles, num_tiles);
vertices = h->vertices + INDEX_H(h, x + (lod_width-1)*num_tiles, y);
sceGuDrawArray((DRAW_PRIM == GU_TRIANGLE_STRIP ? GU_TRIANGLE_FAN : DRAW_PRIM),
GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D,
(1<<(subdiv[0]-subdiv[3])) + (1<<(subdiv[0]-subdiv[2])) + 2, indices, vertices);
indices += (1<<(subdiv[0]-subdiv[3])) + (1<<(subdiv[0]-subdiv[2])) + 2;
}
}
if (subdiv[0] > subdiv[4])
{
//bottom left
if (subdiv[0] > subdiv[3])
{
indices[0] = INDEX_H(h, num_tiles, num_tiles);
j = 1;
for (i = 0; i < 1<<(subdiv[0]-subdiv[4]); i++)
{
indices[j] = INDEX_H(h, 0, num_tiles - i*num_tiles/(1<<(subdiv[0]-subdiv[4])));
j += 1;
}
for (i = 0; i < 1<<(subdiv[0]-subdiv[3]); i++)
{
indices[j] = INDEX_H(h, i*num_tiles/(1<<(subdiv[0]-subdiv[3])), 0);
j += 1;
}
indices[j] = INDEX_H(h, num_tiles, 0);
vertices = h->vertices + INDEX_H(h, x, y);
sceGuDrawArray((DRAW_PRIM == GU_TRIANGLE_STRIP ? GU_TRIANGLE_FAN : DRAW_PRIM),
GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D,
(1<<(subdiv[0]-subdiv[4])) + (1<<(subdiv[0]-subdiv[3])) + 2, indices, vertices);
indices += (1<<(subdiv[0]-subdiv[4])) + (1<<(subdiv[0]-subdiv[3])) + 2;
}
//top left
if (subdiv[0] > subdiv[1])
{
indices[0] = INDEX_H(h, num_tiles, 0);
j = 1;
for (i = 0; i < 1<<(subdiv[0]-subdiv[1]); i++)
{
indices[j] = INDEX_H(h, num_tiles - i*num_tiles/(1<<(subdiv[0]-subdiv[1])), num_tiles);
j += 1;
}
for (i = 0; i < 1<<(subdiv[0]-subdiv[4]); i++)
{
indices[j] = INDEX_H(h, 0, num_tiles - i*num_tiles/(1<<(subdiv[0]-subdiv[4])));
j += 1;
}
indices[j] = INDEX_H(h, 0, 0);
vertices = h->vertices + INDEX_H(h, x, y + (lod_width-1)*num_tiles);
sceGuDrawArray((DRAW_PRIM == GU_TRIANGLE_STRIP ? GU_TRIANGLE_FAN : DRAW_PRIM),
GU_TEXTURE_16BIT|GU_VERTEX_32BITF|GU_INDEX_16BIT|GU_TRANSFORM_3D,
(1<<(subdiv[0]-subdiv[1])) + (1<<(subdiv[0]-subdiv[4])) + 2, indices, vertices);
indices += (1<<(subdiv[0]-subdiv[1])) + (1<<(subdiv[0]-subdiv[4])) + 2;
}
}
}
}
sceGuEndObject();
l->list_ptrs[index] = list;
index += 1;
list += sceGuFinish();
sceGuSync(0, 2);
}
}
l->ready = 1;
}
void xHeightmapDrawLOD(xHeightmapLOD* l)
{
if (!l) return;
if (!l->h || !l->ready) return;
if (!l->indices_buffer || !l->list_buffer || !l->h->vertices) return;
sceGuFrontFace(GU_CCW);
sceGumUpdateMatrix();
int i;
for (i = 0; i < l->patches*l->patches; i++)
{
sceGuCallList(l->list_ptrs[i]);
}
sceGuFrontFace(GU_CW);
}
int xHeightmapGetPatchID(xHeightmapLOD* l, float x, float y)
{
if (!l) return -1;
if (!l->h) return -1;
return (int)(y/(l->patch_width*l->h->tile_scale))*l->patches + (int)(x/(l->patch_width*l->h->tile_scale));
}
void xHeightmapDrawPatchID(xHeightmapLOD* l, int id)
{
if (!l || id < 0) return;
if (!l->h) return;
sceGuFrontFace(GU_CCW);
sceGumUpdateMatrix();
sceGuCallList(l->list_ptrs[id]);
sceGuFrontFace(GU_CW);
}