static int
rendermode_overlay_occluded(void *data, RenderState *state) {
int x = state->x, y = state->y, z = state->z;
if ( (x != 0) && (y != 15) && (z != 127) &&
!is_transparent(getArrayByte3D(state->blocks, x-1, y, z)) &&
!is_transparent(getArrayByte3D(state->blocks, x, y, z+1)) &&
!is_transparent(getArrayByte3D(state->blocks, x, y+1, z))) {
return 1;
}
return 0;
}
static int
rendermode_normal_occluded(void *data, RenderState *state, int x, int y, int z) {
if ( (x != 0) && (y != 15) && (z != 127) &&
!render_mode_hidden(state->rendermode, x-1, y, z) &&
!render_mode_hidden(state->rendermode, x, y, z+1) &&
!render_mode_hidden(state->rendermode, x, y+1, z) &&
!is_transparent(getArrayByte3D(state->blocks, x-1, y, z)) &&
!is_transparent(getArrayByte3D(state->blocks, x, y, z+1)) &&
!is_transparent(getArrayByte3D(state->blocks, x, y+1, z))) {
return 1;
}
return 0;
}
static void get_color(void *data, RenderState *state,
unsigned char *r, unsigned char *g, unsigned char *b, unsigned char *a) {
int x = state->x, y = state->y, z_max = state->z, z;
//RenderModeMineral* self = (RenderModeMineral *)data;
*a = 0;
for (z = 0; z <= z_max; z++) {
int i, tmp, max_i = sizeof(orecolors) / sizeof(struct OreColor);
unsigned char blockid = getArrayByte3D(state->blocks, x, y, z);
for (i = 0; i < max_i && orecolors[i].blockid != 0; i++) {
if (orecolors[i].blockid == blockid) {
*r = orecolors[i].r;
*g = orecolors[i].g;
*b = orecolors[i].b;
tmp = (128 - z_max + z) * 2 - 40;
*a = MIN(MAX(0, tmp), 255);
max_i = i;
break;
}
}
}
}
static int
rendermode_normal_hidden(void *data, RenderState *state, int x, int y, int z) {
RenderModeNormal *self = (RenderModeNormal *)data;
if (z > self->max_depth || z < self->min_depth) {
return 1;
}
if (self->nether)
{
/* hide all blocks above all air blocks */
int below_air = 0;
while (z < 128)
{
if (getArrayByte3D(state->blocks, x, y, z) == 0)
{
below_air = 1;
break;
}
z++;
}
if (!below_air)
return 1;
}
return 0;
}
static void
rendermode_overlay_draw(void *data, RenderState *state, PyObject *src, PyObject *mask, PyObject *mask_light) {
RenderModeOverlay *self = (RenderModeOverlay *)data;
unsigned char r, g, b, a;
PyObject *top_block_py, *block_py;
// exactly analogous to edge-line code for these special blocks
int increment=0;
if (state->block == 44) // half-step
increment=6;
else if (state->block == 78) // snow
increment=9;
/* clear the draw space -- set alpha to 0 within mask */
tint_with_mask(state->img, 255, 255, 255, 0, mask, state->imgx, state->imgy, 0, 0);
/* skip rendering the overlay if we can't see it */
if (state->z != 127) {
unsigned char top_block = getArrayByte3D(state->blocks, state->x, state->y, state->z+1);
if (!is_transparent(top_block)) {
return;
}
/* check to be sure this block is solid/fluid */
top_block_py = PyInt_FromLong(top_block);
if (PySequence_Contains(self->solid_blocks, top_block_py) ||
PySequence_Contains(self->fluid_blocks, top_block_py)) {
/* top block is fluid or solid, skip drawing */
Py_DECREF(top_block_py);
return;
}
Py_DECREF(top_block_py);
}
/* check to be sure this block is solid/fluid */
block_py = PyInt_FromLong(state->block);
if (!PySequence_Contains(self->solid_blocks, block_py) &&
!PySequence_Contains(self->fluid_blocks, block_py)) {
/* not fluid or solid, skip drawing the overlay */
Py_DECREF(block_py);
return;
}
Py_DECREF(block_py);
/* get our color info */
self->get_color(data, state, &r, &g, &b, &a);
/* do the overlay */
if (a > 0) {
alpha_over(state->img, self->white_color, self->facemask_top, state->imgx, state->imgy + increment, 0, 0);
tint_with_mask(state->img, r, g, b, a, self->facemask_top, state->imgx, state->imgy + increment, 0, 0);
}
}
/* shades the drawn block with the given facemask/black_color, based on the
lighting results from (x, y, z) */
static inline void
do_shading_with_mask(RenderModeLighting *self, RenderState *state,
int x, int y, int z, PyObject *mask) {
float black_coeff;
/* first, check for occlusion if the block is in the local chunk */
if (x >= 0 && x < 16 && y >= 0 && y < 16 && z >= 0 && z < 128) {
unsigned char block = getArrayByte3D(state->blocks, x, y, z);
if (!is_transparent(block) && !render_mode_hidden(state->rendermode, x, y, z)) {
/* this face isn't visible, so don't draw anything */
return;
}
} else if (self->skip_sides && (x == -1) && (state->left_blocks != Py_None)) {
unsigned char block = getArrayByte3D(state->left_blocks, 15, state->y, state->z);
if (!is_transparent(block)) {
/* the same thing but for adjacent chunks, this solves an
ugly black doted line between chunks in night rendermode.
This wouldn't be necessary if the textures were truly
tessellate-able */
return;
}
} else if (self->skip_sides && (y == 16) && (state->right_blocks != Py_None)) {
unsigned char block = getArrayByte3D(state->right_blocks, state->x, 0, state->z);
if (!is_transparent(block)) {
/* the same thing but for adjacent chunks, this solves an
ugly black doted line between chunks in night rendermode.
This wouldn't be necessary if the textures were truly
tessellate-able */
return;
}
}
black_coeff = get_lighting_coefficient(self, state, x, y, z);
black_coeff *= self->shade_strength;
alpha_over_full(state->img, self->black_color, mask, black_coeff, state->imgx, state->imgy, 0, 0);
}
/* shades the drawn block with the given facemask/black_color, based on the
lighting results from (x, y, z) */
static inline void
do_shading_with_mask(RenderModeLighting *self, RenderState *state,
int x, int y, int z, PyObject *mask) {
float black_coeff;
/* first, check for occlusion if the block is in the local chunk */
if (x >= 0 && x < 16 && y >= 0 && y < 16 && z >= 0 && z < 128) {
unsigned char block = getArrayByte3D(state->blocks, x, y, z);
if (!is_transparent(block)) {
/* this face isn't visible, so don't draw anything */
return;
}
}
black_coeff = get_lighting_coefficient(self, state, x, y, z, NULL);
alpha_over_full(state->img, self->black_color, mask, black_coeff, state->imgx, state->imgy, 0, 0);
}
/* loads the appropriate light data for the given (possibly non-local)
* coordinates, and returns a black_coeff this is exposed, so other (derived)
* rendermodes can use it
*
* authoratative is a return slot for whether or not this lighting calculation
* is true, or a guess. If we guessed, *authoratative will be false, but if it
* was calculated correctly from available light data, it will be true. You
* may (and probably should) pass NULL.
*/
inline float
get_lighting_coefficient(RenderModeLighting *self, RenderState *state,
int x, int y, int z, int *authoratative) {
/* placeholders for later data arrays, coordinates */
PyObject *blocks = NULL;
PyObject *skylight = NULL;
PyObject *blocklight = NULL;
int local_x = x, local_y = y, local_z = z;
unsigned char block, skylevel, blocklevel;
/* defaults to "guess" until told otherwise */
if (authoratative)
*authoratative = 0;
/* find out what chunk we're in, and translate accordingly */
if (x >= 0 && y < 16) {
blocks = state->blocks;
skylight = self->skylight;
blocklight = self->blocklight;
} else if (x < 0) {
local_x += 16;
blocks = state->left_blocks;
skylight = self->left_skylight;
blocklight = self->left_blocklight;
} else if (y >= 16) {
local_y -= 16;
blocks = state->right_blocks;
skylight = self->right_skylight;
blocklight = self->right_blocklight;
}
/* make sure we have correctly-ranged coordinates */
if (!(local_x >= 0 && local_x < 16 &&
local_y >= 0 && local_y < 16 &&
local_z >= 0 && local_z < 128)) {
return self->calculate_darkness(15, 0);
}
/* also, make sure we have enough info to correctly calculate lighting */
if (blocks == Py_None || blocks == NULL ||
skylight == Py_None || skylight == NULL ||
blocklight == Py_None || blocklight == NULL) {
return self->calculate_darkness(15, 0);
}
block = getArrayByte3D(blocks, local_x, local_y, local_z);
/* if this block is opaque, use a fully-lit coeff instead
to prevent stippled lines along chunk boundaries! */
if (!is_transparent(block)) {
return self->calculate_darkness(15, 0);
}
/* only do special half-step handling if no authoratative pointer was
passed in, which is a sign that we're recursing */
if (block == 44 && authoratative == NULL) {
float average_gather = 0.0f;
unsigned int average_count = 0;
int auth;
float coeff;
/* iterate through all surrounding blocks to take an average */
int dx, dy, dz;
for (dx = -1; dx <= 1; dx += 2) {
for (dy = -1; dy <= 1; dy += 2) {
for (dz = -1; dz <= 1; dz += 2) {
coeff = get_lighting_coefficient(self, state, x+dx, y+dy, z+dz, &auth);
if (auth) {
average_gather += coeff;
average_count++;
}
}
}
}
/* only return the average if at least one was authoratative */
if (average_count > 0)
return average_gather / average_count;
}
if (block == 10 || block == 11) {
/* lava blocks should always be lit! */
return 0.0f;
}
skylevel = getArrayByte3D(skylight, local_x, local_y, local_z);
blocklevel = getArrayByte3D(blocklight, local_x, local_y, local_z);
/* no longer a guess */
if (authoratative)
*authoratative = 1;
return self->calculate_darkness(skylevel, blocklevel);
}
inline unsigned char
estimate_blocklevel(RenderModeLighting *self, RenderState *state,
int x, int y, int z, int *authoratative) {
/* placeholders for later data arrays, coordinates */
PyObject *blocks = NULL;
PyObject *blocklight = NULL;
int local_x = x, local_y = y, local_z = z;
unsigned char block, blocklevel;
unsigned int average_count = 0, average_gather = 0, coeff = 0;
/* defaults to "guess" until told otherwise */
if (authoratative)
*authoratative = 0;
/* find out what chunk we're in, and translate accordingly */
if (x >= 0 && y < 16) {
blocks = state->blocks;
blocklight = self->blocklight;
} else if (x < 0) {
local_x += 16;
blocks = state->left_blocks;
blocklight = self->left_blocklight;
} else if (y >= 16) {
local_y -= 16;
blocks = state->right_blocks;
blocklight = self->right_blocklight;
}
/* make sure we have correctly-ranged coordinates */
if (!(local_x >= 0 && local_x < 16 &&
local_y >= 0 && local_y < 16 &&
local_z >= 0 && local_z < 128)) {
return 0;
}
/* also, make sure we have enough info to correctly calculate lighting */
if (blocks == Py_None || blocks == NULL ||
blocklight == Py_None || blocklight == NULL) {
return 0;
}
block = getArrayByte3D(blocks, local_x, local_y, local_z);
if (authoratative == NULL) {
int auth;
/* iterate through all surrounding blocks to take an average */
int dx, dy, dz, local_block;
for (dx = -1; dx <= 1; dx += 2) {
for (dy = -1; dy <= 1; dy += 2) {
for (dz = -1; dz <= 1; dz += 2) {
/* skip if block is out of range */
if (x+dx < 0 || x+dx >= 16 ||
y+dy < 0 || y+dy >= 16 ||
z+dz < 0 || z+dz >= 128) {
continue;
}
coeff = estimate_blocklevel(self, state, x+dx, y+dy, z+dz, &auth);
local_block = getArrayByte3D(blocks, x+dx, y+dy, z+dz);
/* only add if the block is transparent, this seems to look better than
using every block */
if (auth && is_transparent(local_block)) {
average_gather += coeff;
average_count++;
}
}
}
}
}
/* only return the average if at least one was authoratative */
if (average_count > 0) {
return average_gather / average_count;
}
blocklevel = getArrayByte3D(blocklight, local_x, local_y, local_z);
/* no longer a guess */
if (!(block == 44 || block == 53 || block == 67) && authoratative) {
*authoratative = 1;
}
return blocklevel;
}
inline float
get_lighting_coefficient(RenderModeLighting *self, RenderState *state,
int x, int y, int z) {
/* placeholders for later data arrays, coordinates */
PyObject *blocks = NULL;
PyObject *skylight = NULL;
PyObject *blocklight = NULL;
int local_x = x, local_y = y, local_z = z;
unsigned char block, skylevel, blocklevel;
/* find out what chunk we're in, and translate accordingly */
if (x >= 0 && y < 16) {
blocks = state->blocks;
skylight = self->skylight;
blocklight = self->blocklight;
} else if (x < 0) {
local_x += 16;
blocks = state->left_blocks;
skylight = self->left_skylight;
blocklight = self->left_blocklight;
} else if (y >= 16) {
local_y -= 16;
blocks = state->right_blocks;
skylight = self->right_skylight;
blocklight = self->right_blocklight;
}
/* make sure we have correctly-ranged coordinates */
if (!(local_x >= 0 && local_x < 16 &&
local_y >= 0 && local_y < 16 &&
local_z >= 0 && local_z < 128)) {
return self->calculate_darkness(15, 0);
}
/* also, make sure we have enough info to correctly calculate lighting */
if (blocks == Py_None || blocks == NULL ||
skylight == Py_None || skylight == NULL ||
blocklight == Py_None || blocklight == NULL) {
return self->calculate_darkness(15, 0);
}
block = getArrayByte3D(blocks, local_x, local_y, local_z);
/* if this block is opaque, use a fully-lit coeff instead
to prevent stippled lines along chunk boundaries! */
if (!is_transparent(block)) {
return self->calculate_darkness(15, 0);
}
skylevel = getArrayByte3D(skylight, local_x, local_y, local_z);
blocklevel = getArrayByte3D(blocklight, local_x, local_y, local_z);
/* special half-step handling */
if (block == 44 || block == 53 || block == 67) {
unsigned int upper_block;
/* stairs and half-blocks take the skylevel from the upper block if it's transparent */
if (local_z != 127) {
int upper_counter = 0;
/* but if the upper_block is one of these special half-steps, we need to look at *its* upper_block */
do {
upper_counter++;
upper_block = getArrayByte3D(blocks, local_x, local_y, local_z + upper_counter);
} while ((upper_block == 44 || upper_block == 54 || upper_block == 67) && local_z < 127);
if (is_transparent(upper_block)) {
skylevel = getArrayByte3D(skylight, local_x, local_y, local_z + upper_counter);
}
} else {
upper_block = 0;
skylevel = 15;
}
/* the block has a bad blocklevel, estimate it from neigborhood
* use given coordinates, no local ones! */
blocklevel = estimate_blocklevel(self, state, x, y, z, NULL);
}
if (block == 10 || block == 11) {
/* lava blocks should always be lit! */
return 0.0f;
}
return self->calculate_darkness(skylevel, blocklevel);
}
/* TODO triple check this to make sure reference counting is correct */
PyObject*
chunk_render(PyObject *self, PyObject *args) {
RenderState state;
PyObject *modeobj;
PyObject *blockmap;
int xoff, yoff;
PyObject *imgsize, *imgsize0_py, *imgsize1_py;
int imgsize0, imgsize1;
PyObject *blocks_py;
PyObject *left_blocks_py;
PyObject *right_blocks_py;
PyObject *up_left_blocks_py;
PyObject *up_right_blocks_py;
RenderMode *rendermode;
int i, j;
PyObject *t = NULL;
if (!PyArg_ParseTuple(args, "OOiiiOiiOO", &state.world, &state.regionset, &state.chunkx, &state.chunky, &state.chunkz, &state.img, &xoff, &yoff, &modeobj, &state.textures))
return NULL;
/* set up the render mode */
state.rendermode = rendermode = render_mode_create(modeobj, &state);
if (rendermode == NULL) {
return NULL; // note that render_mode_create will
// set PyErr. No need to set it here
}
/* get the blockmap from the textures object */
blockmap = PyObject_GetAttrString(state.textures, "blockmap");
if (blockmap == NULL) {
render_mode_destroy(rendermode);
return NULL;
}
if (blockmap == Py_None) {
render_mode_destroy(rendermode);
PyErr_SetString(PyExc_RuntimeError, "you must call Textures.generate()");
return NULL;
}
/* get the image size */
imgsize = PyObject_GetAttrString(state.img, "size");
imgsize0_py = PySequence_GetItem(imgsize, 0);
imgsize1_py = PySequence_GetItem(imgsize, 1);
Py_DECREF(imgsize);
imgsize0 = PyInt_AsLong(imgsize0_py);
imgsize1 = PyInt_AsLong(imgsize1_py);
Py_DECREF(imgsize0_py);
Py_DECREF(imgsize1_py);
/* set all block data to unloaded */
for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++) {
state.chunks[i][j].loaded = 0;
}
}
/* get the block data for the center column, erroring out if needed */
if (load_chunk(&state, 0, 0, 1)) {
render_mode_destroy(rendermode);
Py_DECREF(blockmap);
return NULL;
}
if (state.chunks[1][1].sections[state.chunky].blocks == NULL) {
/* this section doesn't exist, let's skeddadle */
render_mode_destroy(rendermode);
Py_DECREF(blockmap);
unload_all_chunks(&state);
Py_RETURN_NONE;
}
/* set blocks_py, state.blocks, and state.blockdatas as convenience */
blocks_py = state.blocks = state.chunks[1][1].sections[state.chunky].blocks;
state.blockdatas = state.chunks[1][1].sections[state.chunky].data;
/* set up the random number generator again for each chunk
so tallgrass is in the same place, no matter what mode is used */
srand(1);
for (state.x = 15; state.x > -1; state.x--) {
for (state.z = 0; state.z < 16; state.z++) {
/* set up the render coordinates */
state.imgx = xoff + state.x*12 + state.z*12;
/* 16*12 -- offset for y direction, 15*6 -- offset for x */
state.imgy = yoff - state.x*6 + state.z*6 + 16*12 + 15*6;
for (state.y = 0; state.y < 16; state.y++) {
unsigned char ancilData;
state.imgy -= 12;
/* get blockid */
state.block = getArrayShort3D(blocks_py, state.x, state.y, state.z);
if (state.block == 0 || render_mode_hidden(rendermode, state.x, state.y, state.z)) {
continue;
}
/* make sure we're rendering inside the image boundaries */
if ((state.imgx >= imgsize0 + 24) || (state.imgx <= -24)) {
continue;
}
if ((state.imgy >= imgsize1 + 24) || (state.imgy <= -24)) {
continue;
}
/* check for occlusion */
if (render_mode_occluded(rendermode, state.x, state.y, state.z)) {
continue;
}
/* everything stored here will be a borrowed ref */
if (block_has_property(state.block, NODATA)) {
/* block shouldn't have data associated with it, set it to 0 */
ancilData = 0;
state.block_data = 0;
state.block_pdata = 0;
} else {
/* block has associated data, use it */
ancilData = getArrayByte3D(state.blockdatas, state.x, state.y, state.z);
state.block_data = ancilData;
/* block that need pseudo ancildata:
* grass, water, glass, chest, restone wire,
* ice, fence, portal, iron bars, glass panes */
if ((state.block == 2) || (state.block == 9) ||
(state.block == 20) || (state.block == 54) ||
(state.block == 55) || (state.block == 64) ||
(state.block == 71) || (state.block == 79) ||
(state.block == 85) || (state.block == 90) ||
(state.block == 101) || (state.block == 102) ||
(state.block == 113) || (state.block == 139)) {
ancilData = generate_pseudo_data(&state, ancilData);
state.block_pdata = ancilData;
} else {
state.block_pdata = 0;
}
}
/* make sure our block info is in-bounds */
if (state.block >= max_blockid || ancilData >= max_data)
continue;
/* get the texture */
t = PyList_GET_ITEM(blockmap, max_data * state.block + ancilData);
/* if we don't get a texture, try it again with 0 data */
if ((t == NULL || t == Py_None) && ancilData != 0)
t = PyList_GET_ITEM(blockmap, max_data * state.block);
/* if we found a proper texture, render it! */
if (t != NULL && t != Py_None)
{
PyObject *src, *mask, *mask_light;
int randx = 0, randy = 0;
src = PyTuple_GetItem(t, 0);
mask = PyTuple_GetItem(t, 0);
mask_light = PyTuple_GetItem(t, 1);
if (mask == Py_None)
mask = src;
if (state.block == 31) {
/* add a random offset to the postion of the tall grass to make it more wild */
randx = rand() % 6 + 1 - 3;
randy = rand() % 6 + 1 - 3;
state.imgx += randx;
state.imgy += randy;
}
render_mode_draw(rendermode, src, mask, mask_light);
if (state.block == 31) {
/* undo the random offsets */
state.imgx -= randx;
state.imgy -= randy;
}
}
}
}
}
/* free up the rendermode info */
render_mode_destroy(rendermode);
Py_DECREF(blockmap);
unload_all_chunks(&state);
Py_RETURN_NONE;
}
static void
rendermode_normal_draw(void *data, RenderState *state, PyObject *src, PyObject *mask, PyObject *mask_light) {
RenderModeNormal *self = (RenderModeNormal *)data;
/* draw the block! */
alpha_over(state->img, src, mask, state->imgx, state->imgy, 0, 0);
/* check for biome-compatible blocks
*
* NOTES for maintainers:
*
* To add a biome-compatible block, add an OR'd condition to this
* following if block, a case to the first switch statement to handle when
* biome info IS available, and another case to the second switch
* statement for when biome info ISN'T available.
*
* Make sure that in textures.py, the generated textures are the
* biome-compliant ones! The tinting is now all done here.
*/
if (/* grass, but not snowgrass */
(state->block == 2 && !(state->z < 127 && getArrayByte3D(state->blocks, state->x, state->y, state->z+1) == 78)) ||
/* water */
state->block == 8 || state->block == 9 ||
/* leaves */
state->block == 18 ||
/* tallgrass, but not dead shrubs */
(state->block == 31 && state->block_data != 0) ||
/* pumpkin/melon stem, not fully grown. Fully grown stems
* get constant brown color (see textures.py) */
(((state->block == 104) || (state->block == 105)) && (state->block_data != 7)) ||
/* vines */
state->block == 106 ||
/* lily pads */
state->block == 111)
{
/* do the biome stuff! */
PyObject *facemask = mask;
unsigned char r, g, b;
if (state->block == 2) {
/* grass needs a special facemask */
facemask = self->grass_texture;
}
if (self->biome_data) {
/* we have data, so use it! */
unsigned int index;
PyObject *color = NULL;
index = ((self->chunk_y * 16) + state->y) * 16 * 32 + (self->chunk_x * 16) + state->x;
index = big_endian_ushort(getArrayShort1D(self->biome_data, index));
switch (state->block) {
case 2:
/* grass */
color = PySequence_GetItem(self->grasscolor, index);
break;
case 8:
case 9:
/* water */
if (self->watercolor)
{
color = PySequence_GetItem(self->watercolor, index);
} else {
color = NULL;
facemask = NULL;
}
break;
case 18:
/* leaves */
if (state->block_data != 2)
{
/* not birch! */
color = PySequence_GetItem(self->foliagecolor, index);
} else {
/* birch!
birch foliage color is flipped XY-ways */
unsigned int index_x = 255 - (index % 256);
unsigned int index_y = 255 - (index / 256);
index = index_y * 256 + index_x;
color = PySequence_GetItem(self->foliagecolor, index);
}
break;
case 31:
/* tall grass */
color = PySequence_GetItem(self->grasscolor, index);
break;
case 104:
/* pumpkin stem */
color = PySequence_GetItem(self->grasscolor, index);
break;
case 105:
/* melon stem */
color = PySequence_GetItem(self->grasscolor, index);
break;
case 106:
/* vines */
color = PySequence_GetItem(self->grasscolor, index);
break;
case 111:
/* lily padas */
color = PySequence_GetItem(self->grasscolor, index);
break;
default:
break;
};
if (color)
{
/* we've got work to do */
r = PyInt_AsLong(PyTuple_GET_ITEM(color, 0));
g = PyInt_AsLong(PyTuple_GET_ITEM(color, 1));
b = PyInt_AsLong(PyTuple_GET_ITEM(color, 2));
Py_DECREF(color);
}
} else {
if (state->block == 2 || state->block == 31 ||
state->block == 104 || state->block == 105)
/* grass and pumpkin/melon stems */
{
r = 115;
g = 175;
b = 71;
}
if (state->block == 8 || state->block == 9)
/* water */
{
/* by default water is fine with nothing */
facemask = NULL;
}
if (state->block == 18 || state->block == 106 || state->block == 111)
/* leaves, vines and lyli pads */
{
r = 37;
g = 118;
b = 25;
}
}
if (facemask)
tint_with_mask(state->img, r, g, b, 255, facemask, state->imgx, state->imgy, 0, 0);
}
if (self->height_fading) {
/* do some height fading */
PyObject *height_color = self->white_color;
/* negative alpha => darkness, positive => light */
float alpha = (1.0 / (1 + expf((70 - state->z) / 11.0))) * 0.6 - 0.55;
if (alpha < 0.0) {
alpha *= -1;
height_color = self->black_color;
}
alpha_over_full(state->img, height_color, mask_light, alpha, state->imgx, state->imgy, 0, 0);
}
/* Draw some edge lines! */
// draw.line(((imgx+12,imgy+increment), (imgx+22,imgy+5+increment)), fill=(0,0,0), width=1)
if (state->block == 44 || state->block == 78 || !is_transparent(state->block)) {
Imaging img_i = imaging_python_to_c(state->img);
unsigned char ink[] = {0, 0, 0, 255 * self->edge_opacity};
int increment=0;
if (state->block == 44) // half-step
increment=6;
else if ((state->block == 78) || (state->block == 93) || (state->block == 94)) // snow, redstone repeaters (on and off)
increment=9;
if ((state->x == 15) && (state->up_right_blocks != Py_None)) {
unsigned char side_block = getArrayByte3D(state->up_right_blocks, 0, state->y, state->z);
if (side_block != state->block && is_transparent(side_block)) {
ImagingDrawLine(img_i, state->imgx+12, state->imgy+1+increment, state->imgx+22+1, state->imgy+5+1+increment, &ink, 1);
ImagingDrawLine(img_i, state->imgx+12, state->imgy+increment, state->imgx+22+1, state->imgy+5+increment, &ink, 1);
}
} else if (state->x != 15) {
unsigned char side_block = getArrayByte3D(state->blocks, state->x+1, state->y, state->z);
if (side_block != state->block && is_transparent(side_block)) {
ImagingDrawLine(img_i, state->imgx+12, state->imgy+1+increment, state->imgx+22+1, state->imgy+5+1+increment, &ink, 1);
ImagingDrawLine(img_i, state->imgx+12, state->imgy+increment, state->imgx+22+1, state->imgy+5+increment, &ink, 1);
}
}
// if y != 0 and blocks[x,y-1,z] == 0
// chunk boundries are annoying
if ((state->y == 0) && (state->up_left_blocks != Py_None)) {
unsigned char side_block = getArrayByte3D(state->up_left_blocks, state->x, 15, state->z);
if (side_block != state->block && is_transparent(side_block)) {
ImagingDrawLine(img_i, state->imgx, state->imgy+6+1+increment, state->imgx+12+1, state->imgy+1+increment, &ink, 1);
ImagingDrawLine(img_i, state->imgx, state->imgy+6+increment, state->imgx+12+1, state->imgy+increment, &ink, 1);
}
} else if (state->y != 0) {
unsigned char side_block = getArrayByte3D(state->blocks, state->x, state->y-1, state->z);
if (side_block != state->block && is_transparent(side_block)) {
// draw.line(((imgx,imgy+6+increment), (imgx+12,imgy+increment)), fill=(0,0,0), width=1)
ImagingDrawLine(img_i, state->imgx, state->imgy+6+1+increment, state->imgx+12+1, state->imgy+1+increment, &ink, 1);
ImagingDrawLine(img_i, state->imgx, state->imgy+6+increment, state->imgx+12+1, state->imgy+increment, &ink, 1);
}
}
}
}
unsigned char
check_adjacent_blocks(RenderState *state, int x,int y,int z, unsigned char blockid) {
/*
* Generates a pseudo ancillary data for blocks that depend of
* what are surrounded and don't have ancillary data. This
* function is through generate_pseudo_data.
*
* This uses a binary number of 4 digits to encode the info.
* The encode is:
*
* 0b1234:
* Bit: 1 2 3 4
* Side: +x +y -x -y
* Values: bit = 0 -> The corresponding side block has different blockid
* bit = 1 -> The corresponding side block has same blockid
* Example: if the bit1 is 1 that means that there is a block with
* blockid in the side of the +x direction.
*/
unsigned char pdata=0;
if (state->x == 15) { /* +x direction */
if (state->up_right_blocks != Py_None) { /* just in case we are in the end of the world */
if (getArrayByte3D(state->up_right_blocks, 0, y, z) == blockid) {
pdata = pdata|(1 << 3);
}
}
} else {
if (getArrayByte3D(state->blocks, x + 1, y, z) == blockid) {
pdata = pdata|(1 << 3);
}
}
if (state->y == 15) { /* +y direction*/
if (state->right_blocks != Py_None) {
if (getArrayByte3D(state->right_blocks, x, 0, z) == blockid) {
pdata = pdata|(1 << 2);
}
}
} else {
if (getArrayByte3D(state->blocks, x, y + 1, z) == blockid) {
pdata = pdata|(1 << 2);
}
}
if (state->x == 0) { /* -x direction*/
if (state->left_blocks != Py_None) {
if (getArrayByte3D(state->left_blocks, 15, y, z) == blockid) {
pdata = pdata|(1 << 1);
}
}
} else {
if (getArrayByte3D(state->blocks, x - 1, y, z) == blockid) {
pdata = pdata|(1 << 1);
}
}
if (state->y == 0) { /* -y direction */
if (state->up_left_blocks != Py_None) {
if (getArrayByte3D(state->up_left_blocks, x, 15, z) == blockid) {
pdata = pdata|(1 << 0);
}
}
} else {
if (getArrayByte3D(state->blocks, x, y - 1, z) == blockid) {
pdata = pdata|(1 << 0);
}
}
return pdata;
}
/* TODO triple check this to make sure reference counting is correct */
PyObject*
chunk_render(PyObject *self, PyObject *args) {
RenderState state;
int xoff, yoff;
PyObject *imgsize, *imgsize0_py, *imgsize1_py;
int imgsize0, imgsize1;
PyObject *blocks_py;
PyObject *left_blocks_py;
PyObject *right_blocks_py;
PyObject *up_left_blocks_py;
PyObject *up_right_blocks_py;
RenderModeInterface *rendermode;
void *rm_data;
PyObject *t = NULL;
if (!PyArg_ParseTuple(args, "OOiiO", &state.self, &state.img, &xoff, &yoff, &state.blockdata_expanded))
return NULL;
/* fill in important modules */
state.textures = textures;
state.chunk = chunk_mod;
/* set up the render mode */
rendermode = get_render_mode(&state);
rm_data = calloc(1, rendermode->data_size);
if (rendermode->start(rm_data, &state)) {
free(rm_data);
return Py_BuildValue("i", "-1");
}
/* get the image size */
imgsize = PyObject_GetAttrString(state.img, "size");
imgsize0_py = PySequence_GetItem(imgsize, 0);
imgsize1_py = PySequence_GetItem(imgsize, 1);
Py_DECREF(imgsize);
imgsize0 = PyInt_AsLong(imgsize0_py);
imgsize1 = PyInt_AsLong(imgsize1_py);
Py_DECREF(imgsize0_py);
Py_DECREF(imgsize1_py);
/* get the block data directly from numpy: */
blocks_py = PyObject_GetAttrString(state.self, "blocks");
state.blocks = blocks_py;
left_blocks_py = PyObject_GetAttrString(state.self, "left_blocks");
state.left_blocks = left_blocks_py;
right_blocks_py = PyObject_GetAttrString(state.self, "right_blocks");
state.right_blocks = right_blocks_py;
up_left_blocks_py = PyObject_GetAttrString(state.self, "up_left_blocks");
state.up_left_blocks = up_left_blocks_py;
up_right_blocks_py = PyObject_GetAttrString(state.self, "up_right_blocks");
state.up_right_blocks = up_right_blocks_py;
for (state.x = 15; state.x > -1; state.x--) {
for (state.y = 0; state.y < 16; state.y++) {
PyObject *blockid = NULL;
/* set up the render coordinates */
state.imgx = xoff + state.x*12 + state.y*12;
/* 128*12 -- offset for z direction, 15*6 -- offset for x */
state.imgy = yoff - state.x*6 + state.y*6 + 128*12 + 15*6;
for (state.z = 0; state.z < 128; state.z++) {
state.imgy -= 12;
/* get blockid */
state.block = getArrayByte3D(blocks_py, state.x, state.y, state.z);
if (state.block == 0) {
continue;
}
/* make sure we're rendering inside the image boundaries */
if ((state.imgx >= imgsize0 + 24) || (state.imgx <= -24)) {
continue;
}
if ((state.imgy >= imgsize1 + 24) || (state.imgy <= -24)) {
continue;
}
/* decref'd on replacement *and* at the end of the z for block */
if (blockid) {
Py_DECREF(blockid);
}
blockid = PyInt_FromLong(state.block);
// check for occlusion
if (rendermode->occluded(rm_data, &state)) {
continue;
}
// everything stored here will be a borrowed ref
/* get the texture and mask from block type / ancil. data */
if (!PySequence_Contains(special_blocks, blockid)) {
/* t = textures.blockmap[blockid] */
t = PyList_GetItem(blockmap, state.block);
} else {
PyObject *tmp;
unsigned char ancilData = getArrayByte3D(state.blockdata_expanded, state.x, state.y, state.z);
if ((state.block == 85) || (state.block == 9) || (state.block == 55) || (state.block == 54) || (state.block == 2) || (state.block == 90)) {
ancilData = generate_pseudo_data(&state, ancilData);
}
tmp = PyTuple_New(2);
Py_INCREF(blockid); /* because SetItem steals */
PyTuple_SetItem(tmp, 0, blockid);
PyTuple_SetItem(tmp, 1, PyInt_FromLong(ancilData));
/* this is a borrowed reference. no need to decref */
t = PyDict_GetItem(specialblockmap, tmp);
Py_DECREF(tmp);
}
/* if we found a proper texture, render it! */
if (t != NULL && t != Py_None)
{
PyObject *src, *mask, *mask_light;
src = PyTuple_GetItem(t, 0);
mask = PyTuple_GetItem(t, 1);
mask_light = PyTuple_GetItem(t, 2);
if (mask == Py_None)
mask = src;
rendermode->draw(rm_data, &state, src, mask, mask_light);
}
}
if (blockid) {
Py_DECREF(blockid);
blockid = NULL;
}
}
}
/* free up the rendermode info */
rendermode->finish(rm_data, &state);
free(rm_data);
Py_DECREF(blocks_py);
Py_XDECREF(left_blocks_py);
Py_XDECREF(right_blocks_py);
Py_XDECREF(up_left_blocks_py);
Py_XDECREF(up_right_blocks_py);
return Py_BuildValue("i",2);
}
unsigned char
generate_pseudo_data(RenderState *state, unsigned char ancilData) {
/*
* Generates a fake ancillary data for blocks that are drawn
* depending on what are surrounded.
*/
int x = state->x, y = state->y, z = state->z;
unsigned char data = 0;
if (state->block == 2) { /* grass */
/* return 0x10 if grass is covered in snow */
if (z < 127 && getArrayByte3D(state->blocks, x, y, z+1) == 78)
return 0x10;
return ancilData;
} else if (state->block == 9) { /* water */
/* an aditional bit for top is added to the 4 bits of check_adjacent_blocks */
if (ancilData == 0) { /* static water */
if ((z != 127) && (getArrayByte3D(state->blocks, x, y, z+1) == 9)) {
data = 0;
} else {
data = 16;
}
return data; /* = 0b10000 */
} else if ((ancilData > 0) && (ancilData < 8)) { /* flowing water */
data = (check_adjacent_blocks(state, x, y, z, state->block) ^ 0x0f) | 0x10;
return data;
} else if (ancilData >= 8) { /* falling water */
data = (check_adjacent_blocks(state, x, y, z, state->block) ^ 0x0f);
return data;
}
} else if (state->block == 85) { /* fences */
return check_adjacent_blocks(state, x, y, z, state->block);
} else if (state->block == 55) { /* redstone */
/* three addiotional bit are added, one for on/off state, and
* another two for going-up redstone wire in the same block
* (connection with the level z+1) */
unsigned char above_level_data = 0, same_level_data = 0, below_level_data = 0, possibly_connected = 0, final_data = 0;
/* check for air in z+1, no air = no connection with upper level */
if ((z != 127) && (getArrayByte3D(state->left_blocks, x, y, z) == 0)) {
above_level_data = check_adjacent_blocks(state, x, y, z + 1, state->block);
} /* else above_level_data = 0 */
/* check connection with same level */
same_level_data = check_adjacent_blocks(state, x, y, z, 55);
/* check the posibility of connection with z-1 level, check for air */
possibly_connected = check_adjacent_blocks(state, x, y, z, 0);
/* check connection with z-1 level */
if (z != 0) {
below_level_data = check_adjacent_blocks(state, x, y, z - 1, state->block);
} /* else below_level_data = 0 */
final_data = above_level_data | same_level_data | (below_level_data & possibly_connected);
/* add the three bits */
if (ancilData > 0) { /* powered redstone wire */
final_data = final_data | 0x40;
}
if ((above_level_data & 0x01)) { /* draw top left going up redstonewire */
final_data = final_data | 0x20;
}
if ((above_level_data & 0x08)) { /* draw top right going up redstonewire */
final_data = final_data | 0x10;
}
return final_data;
} else if (state-> block == 54) { /* chests */
/* the top 2 bits are used to store the type of chest
* (single or double), the 2 bottom bits are used for
* orientation, look textures.py for more information. */
/* if placed alone chests always face west, return 0 to make a
* chest facing west */
unsigned char chest_data = 0, air_data = 0, final_data = 0;
/* search for chests */
chest_data = check_adjacent_blocks(state, x, y, z, 54);
/* search for air */
air_data = check_adjacent_blocks(state, x, y, z, 0);
if (chest_data == 1) { /* another chest in the east */
final_data = final_data | 0x8; /* only can face to north or south */
if ( (air_data & 0x2) == 2 ) {
final_data = final_data | 0x1; /* facing north */
} else {
final_data = final_data | 0x3; /* facing south */
}
} else if (chest_data == 2) { /* in the north */
final_data = final_data | 0x4; /* only can face to east or west */
if ( !((air_data & 0x4) == 4) ) { /* 0 = west */
final_data = final_data | 0x2; /* facing east */
}
} else if (chest_data == 4) { /*in the west */
final_data = final_data | 0x4;
if ( (air_data & 0x2) == 2 ) {
final_data = final_data | 0x1; /* facing north */
} else {
final_data = final_data | 0x3; /* facing south */
}
} else if (chest_data == 8) { /*in the south */
final_data = final_data | 0x8;
if ( !((air_data & 0x4) == 4) ) {
final_data = final_data | 0x2; /* facing east */
}
} else if (chest_data == 0) {
/* Single chest, determine the orientation */
if ( ((air_data & 0x8) == 0) && ((air_data & 0x2) == 2) ) { /* block in +x and no block in -x */
final_data = final_data | 0x1; /* facing north */
} else if ( ((air_data & 0x2) == 0) && ((air_data & 0x8) == 8)) {
final_data = final_data | 0x3;
} else if ( ((air_data & 0x4) == 0) && ((air_data & 0x1) == 1)) {
final_data = final_data | 0x2;
} /* else, facing west, value = 0 */
} else {
/* more than one adjacent chests! render as normal chest */
return 0;
}
return final_data;
} else if (state->block == 90) {
return check_adjacent_blocks(state, x, y, z, state->block);
}
return 0;
}
