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Add stained glass and stained glass panels

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Note that this commit changes the pseudo-ancil-data type from unsigned
int to an unsigned short.  Our pseudoancil code creates 5 bits of data
to store adjacency information for glass.  Glass also has 4 bits for
color info.  This means we need a total of 9 bits to render these (thus
int --> short)
This commit is contained in:
Andrew Chin
2013-10-26 01:47:07 -04:00
parent 3eaa507d95
commit 46bda131f9
3 changed files with 35 additions and 18 deletions
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28
overviewer_core/src/iterate.c
View File

@@ -207,7 +207,7 @@ unload_all_chunks(RenderState *state) {
}
}
unsigned char
unsigned short
check_adjacent_blocks(RenderState *state, int x,int y,int z, unsigned short blockid) {
/*
* Generates a pseudo ancillary data for blocks that depend of
@@ -265,14 +265,14 @@ is_stairs(int block) {
return 0;
}
unsigned char
generate_pseudo_data(RenderState *state, unsigned char ancilData) {
unsigned short
generate_pseudo_data(RenderState *state, unsigned short 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;
unsigned short data = 0;
if (state->block == 2) { /* grass */
/* return 0x10 if grass is covered in snow */
@@ -295,15 +295,18 @@ generate_pseudo_data(RenderState *state, unsigned char ancilData) {
data = (check_adjacent_blocks(state, x, y, z, state->block) ^ 0x0f);
return data;
}
} else if ((state->block == 20) || (state->block == 79)) { /* glass and ice */
/* an aditional bit for top is added to the 4 bits of check_adjacent_blocks */
if (get_data(state, BLOCKS, x, y+1, z) == 20) {
} else if ((state->block == 20) || (state->block == 79) || (state->block == 95)) { /* glass and ice and stained glass*/
/* an aditional bit for top is added to the 4 bits of check_adjacent_blocks
* Note that stained glass encodes 16 colors using 4 bits. this pushes us over the 8-bits of an unsigned char,
* forcing us to use an unsigned short to hold 16 bits of pseudo ancil data
* */
if ((get_data(state, BLOCKS, x, y+1, z) == 20) || (get_data(state, BLOCKS, x, y+1, z) == 95)) {
data = 0;
} else {
data = 16;
}
data = (check_adjacent_blocks(state, x, y, z, state->block) ^ 0x0f) | data;
return data;
return (data << 4) | (ancilData & 0x0f);
} else if (state->block == 85) { /* fences */
/* check for fences AND fence gates */
return check_adjacent_blocks(state, x, y, z, state->block) | check_adjacent_blocks(state, x, y, z, 107);
@@ -379,12 +382,14 @@ generate_pseudo_data(RenderState *state, unsigned char ancilData) {
}
return final_data;
} else if ((state->block == 101) || (state->block == 102)) {
} else if ((state->block == 101) || (state->block == 102) || (state->block == 160)) {
/* iron bars and glass panes:
* they seem to stick to almost everything but air,
* not sure yet! Still a TODO! */
/* return check adjacent blocks with air, bit inverted */
return check_adjacent_blocks(state, x, y, z, 0) ^ 0x0f;
// shift up 4 bits because the lower 4 bits encode color
data = (check_adjacent_blocks(state, x, y, z, 0) ^ 0x0f);
return (data << 4) | (ancilData & 0xf);
} else if ((state->block == 90) || (state->block == 113)) {
/* portal and nether brick fences */
@@ -656,7 +661,7 @@ chunk_render(PyObject *self, PyObject *args) {
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;
unsigned short ancilData;
state.imgy -= 12;
@@ -701,6 +706,7 @@ chunk_render(PyObject *self, PyObject *args) {
(state.block == 101) || (state.block == 102) ||
(state.block == 111) || (state.block == 113) ||
(state.block == 139) || (state.block == 175) ||
(state.block == 160) || (state.block == 95) ||
is_stairs(state.block)) {
ancilData = generate_pseudo_data(&state, ancilData);
state.block_pdata = ancilData;

4
overviewer_core/src/overviewer.h
View File

@@ -26,7 +26,7 @@
// increment this value if you've made a change to the c extesion
// and want to force users to rebuild
#define OVERVIEWER_EXTENSION_VERSION 43
#define OVERVIEWER_EXTENSION_VERSION 44
/* Python PIL, and numpy headers */
#include <Python.h>
@@ -108,7 +108,7 @@ typedef struct {
int x, y, z;
unsigned short block;
unsigned char block_data;
unsigned char block_pdata;
unsigned short block_pdata;
/* useful information about this, and neighboring, chunks */
PyObject *blockdatas;