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Added a simple software "ambient occlusion" effect, like minecraft's "smooth lighting"

This commit is contained in:
Perttu Ahola 2011-04-24 11:41:33 +03:00
parent 83414e8b73
commit 8c1f7a0dd2
2 changed files with 174 additions and 23 deletions
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8
src/game.cpp
View File

@ -26,6 +26,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "guiTextInputMenu.h"
#include "guiFurnaceMenu.h"
#include "materials.h"
#include "config.h"
/*
Setting this to 1 enables a special camera mode that forces
@ -1708,13 +1709,12 @@ void the_game(
endscenetime_avg = endscenetime_avg * 0.95 + (float)endscenetime*0.05;
char temptext[300];
snprintf(temptext, 300, "Minetest-c55 ("
"F: item=%i"
", R: range_all=%i"
snprintf(temptext, 300, "Minetest-c55 %s ("
"R: range_all=%i"
")"
" drawtime=%.0f, beginscenetime=%.0f"
", scenetime=%.0f, endscenetime=%.0f",
g_selected_item,
VERSION_STRING,
draw_control.range_all,
drawtime_avg,
beginscenetime_avg,

189
src/mapblock.cpp
View File

@ -133,7 +133,12 @@ u8 getFaceLight(u32 daynight_ratio, MapNode n, MapNode n2,
#ifndef SERVER
void makeFastFace(TileSpec tile, u8 light, v3f p,
inline video::SColor lightColor(u8 alpha, u8 light)
{
return video::SColor(alpha,light,light,light);
}
void makeFastFace(TileSpec tile, u8 li0, u8 li1, u8 li2, u8 li3, v3f p,
v3s16 dir, v3f scale, v3f posRelative_f,
core::array<FastFace> &dest)
{
@ -197,22 +202,18 @@ void makeFastFace(TileSpec tile, u8 light, v3f p,
v3f zerovector = v3f(0,0,0);
//u8 li = decode_light(light);
u8 li = light;
//u8 li = 255; //DEBUG
u8 alpha = tile.alpha;
/*u8 alpha = 255;
if(tile.id == TILE_WATER)
alpha = WATER_ALPHA;*/
video::SColor c = video::SColor(alpha,li,li,li);
float x0 = tile.texture.pos.X;
float y0 = tile.texture.pos.Y;
float w = tile.texture.size.X;
float h = tile.texture.size.Y;
/*video::SColor c = lightColor(alpha, li);
face.vertices[0] = video::S3DVertex(vertex_pos[0], v3f(0,1,0), c,
core::vector2d<f32>(x0+w*abs_scale, y0+h));
face.vertices[1] = video::S3DVertex(vertex_pos[1], v3f(0,1,0), c,
@ -220,6 +221,19 @@ void makeFastFace(TileSpec tile, u8 light, v3f p,
face.vertices[2] = video::S3DVertex(vertex_pos[2], v3f(0,1,0), c,
core::vector2d<f32>(x0, y0));
face.vertices[3] = video::S3DVertex(vertex_pos[3], v3f(0,1,0), c,
core::vector2d<f32>(x0+w*abs_scale, y0));*/
face.vertices[0] = video::S3DVertex(vertex_pos[0], v3f(0,1,0),
lightColor(alpha, li0),
core::vector2d<f32>(x0+w*abs_scale, y0+h));
face.vertices[1] = video::S3DVertex(vertex_pos[1], v3f(0,1,0),
lightColor(alpha, li1),
core::vector2d<f32>(x0, y0+h));
face.vertices[2] = video::S3DVertex(vertex_pos[2], v3f(0,1,0),
lightColor(alpha, li2),
core::vector2d<f32>(x0, y0));
face.vertices[3] = video::S3DVertex(vertex_pos[3], v3f(0,1,0),
lightColor(alpha, li3),
core::vector2d<f32>(x0+w*abs_scale, y0));
face.tile = tile;
@ -227,7 +241,6 @@ void makeFastFace(TileSpec tile, u8 light, v3f p,
//f->tile = TILE_STONE;
dest.push_back(face);
//return f;
}
/*
@ -324,6 +337,52 @@ u8 getNodeContent(v3s16 p, MapNode mn, NodeModMap &temp_mods)
return mn.d;
}
v3s16 dirs8[8] = {
v3s16(0,0,0),
v3s16(0,0,1),
v3s16(0,1,0),
v3s16(0,1,1),
v3s16(1,0,0),
v3s16(1,1,0),
v3s16(1,0,1),
v3s16(1,1,1),
};
// Calculate lighting at the XYZ- corner of p
u8 getSmoothLight(v3s16 p, VoxelManipulator &vmanip, u32 daynight_ratio)
{
u16 ambient_occlusion = 0;
u16 light = 0;
u16 light_count = 0;
for(u32 i=0; i<8; i++)
{
MapNode n = vmanip.getNodeNoEx(p - dirs8[i]);
if(content_features(n.d).param_type == CPT_LIGHT)
{
light += decode_light(n.getLightBlend(daynight_ratio));
light_count++;
}
else
{
if(n.d != CONTENT_IGNORE)
ambient_occlusion++;
}
}
if(light_count == 0)
return 255;
light /= light_count;
if(ambient_occlusion > 4)
{
ambient_occlusion -= 4;
light = (float)light / ((float)ambient_occlusion * 0.5 + 1.0);
}
return light;
}
/*
startpos:
translate_dir: unit vector with only one of x, y or z
@ -408,7 +467,7 @@ void updateFastFaceRow(
end_of_texture = true;
}
//end_of_texture = true; //DEBUG
end_of_texture = true; //DEBUG
if(next_is_different || end_of_texture)
{
@ -428,33 +487,125 @@ void updateFastFaceRow(
// Center point of face (kind of)
v3f sp = pf - ((f32)continuous_tiles_count / 2. - 0.5) * translate_dir_f;
v3f scale(1,1,1);
if(translate_dir.X != 0){
u8 li0=255, li1=255, li2=255, li3=255;
// First node
v3s16 p_first = p - (continuous_tiles_count-1) * translate_dir;
v3s16 p_map = blockpos_nodes + p;
v3s16 p_map_first = p_first + blockpos_nodes;
if(translate_dir.X != 0)
{
scale.X = continuous_tiles_count;
}
if(translate_dir.Y != 0){
if(translate_dir.Y != 0)
{
scale.Y = continuous_tiles_count;
}
if(translate_dir.Z != 0){
if(translate_dir.Z != 0)
{
scale.Z = continuous_tiles_count;
}
//FastFace *f;
//u8 li = decode_light(light);
// If node at sp (tile0) is more solid
if(mf == 1)
{
makeFastFace(tile0, decode_light(light),
if(face_dir == v3s16(0,0,1))
{
// Going along X+, faces in Z+
li0 = getSmoothLight(p_map_first+v3s16(0,0,1),
vmanip, daynight_ratio);
li1 = getSmoothLight(p_map+v3s16(1,0,1),
vmanip, daynight_ratio);
li2 = getSmoothLight(p_map+v3s16(1,1,1),
vmanip, daynight_ratio);
li3 = getSmoothLight(p_map_first+v3s16(0,1,1),
vmanip, daynight_ratio);
}
else if(face_dir == v3s16(0,1,0))
{
// Going along X+, faces in Y+
li0 = getSmoothLight(p_map_first+v3s16(0,1,1),
vmanip, daynight_ratio);
li1 = getSmoothLight(p_map+v3s16(1,1,1),
vmanip, daynight_ratio);
li2 = getSmoothLight(p_map+v3s16(1,1,0),
vmanip, daynight_ratio);
li3 = getSmoothLight(p_map_first+v3s16(0,1,0),
vmanip, daynight_ratio);
}
else if(face_dir == v3s16(1,0,0))
{
// Going along Z+, faces in X+
li0 = getSmoothLight(p_map_first+v3s16(1,0,1),
vmanip, daynight_ratio);
li1 = getSmoothLight(p_map+v3s16(1,0,0),
vmanip, daynight_ratio);
li2 = getSmoothLight(p_map+v3s16(1,1,0),
vmanip, daynight_ratio);
li3 = getSmoothLight(p_map_first+v3s16(1,1,1),
vmanip, daynight_ratio);
}
else assert(0);
//makeFastFace(tile0, li, li, li, li,
makeFastFace(tile0, li0, li1, li2, li3,
sp, face_dir, scale,
posRelative_f, dest);
}
// If node at sp is less solid (mf == 2)
else
{
makeFastFace(tile1, decode_light(light),
// Offset to the actual solid block
p_map += face_dir;
p_map_first += face_dir;
if(face_dir == v3s16(0,0,1))
{
// Going along X+, faces in Z-
li0 = getSmoothLight(p_map+v3s16(1,0,0),
vmanip, daynight_ratio);
li1 = getSmoothLight(p_map_first+v3s16(0,0,0),
vmanip, daynight_ratio);
li2 = getSmoothLight(p_map_first+v3s16(0,1,0),
vmanip, daynight_ratio);
li3 = getSmoothLight(p_map+v3s16(1,1,0),
vmanip, daynight_ratio);
}
else if(face_dir == v3s16(0,1,0))
{
// Going along X+, faces in Y-
li0 = getSmoothLight(p_map_first+v3s16(0,0,0),
vmanip, daynight_ratio);
li1 = getSmoothLight(p_map+v3s16(1,0,0),
vmanip, daynight_ratio);
li2 = getSmoothLight(p_map+v3s16(1,0,1),
vmanip, daynight_ratio);
li3 = getSmoothLight(p_map_first+v3s16(0,0,1),
vmanip, daynight_ratio);
}
else if(face_dir == v3s16(1,0,0))
{
// Going along Z+, faces in X-
li0 = getSmoothLight(p_map_first+v3s16(0,0,0),
vmanip, daynight_ratio);
li1 = getSmoothLight(p_map+v3s16(0,0,1),
vmanip, daynight_ratio);
li2 = getSmoothLight(p_map+v3s16(0,1,1),
vmanip, daynight_ratio);
li3 = getSmoothLight(p_map_first+v3s16(0,1,0),
vmanip, daynight_ratio);
}
else assert(0);
//makeFastFace(tile1, li, li, li, li,
makeFastFace(tile1, li0, li1, li2, li3,
sp+face_dir_f, -face_dir, scale,
posRelative_f, dest);
}
//dest.push_back(f);
}
continuous_tiles_count = 0;
@ -598,7 +749,7 @@ scene::SMesh* makeMapBlockMesh(MeshMakeData *data)
//TimeTaker timer2("updateMesh() collect");
/*
Go through every y,z and get top faces in rows of x+
Go through every y,z and get top(y+) faces in rows of x+
*/
for(s16 y=0; y<MAP_BLOCKSIZE; y++){
for(s16 z=0; z<MAP_BLOCKSIZE; z++){
@ -615,7 +766,7 @@ scene::SMesh* makeMapBlockMesh(MeshMakeData *data)
}
}
/*
Go through every x,y and get right faces in rows of z+
Go through every x,y and get right(x+) faces in rows of z+
*/
for(s16 x=0; x<MAP_BLOCKSIZE; x++){
for(s16 y=0; y<MAP_BLOCKSIZE; y++){
@ -632,7 +783,7 @@ scene::SMesh* makeMapBlockMesh(MeshMakeData *data)
}
}
/*
Go through every y,z and get back faces in rows of x+
Go through every y,z and get back(z+) faces in rows of x+
*/
for(s16 z=0; z<MAP_BLOCKSIZE; z++){
for(s16 y=0; y<MAP_BLOCKSIZE; y++){