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voxel-engine
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shaders: fix rotated textures on x axis

main
EmaMaker 2023-10-11 20:47:41 +02:00
parent ebef608000
commit fa3d36ec58
2 changed files with 8 additions and 150 deletions
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143
intervalmap.hpp
View File

@ -1,143 +0,0 @@
#ifndef INTERVALMAP_H
#define INTERVALMAP_H
#include <iostream>
#include <iterator> //std::prev
#include <limits> // std::numeric_limits
#include <memory> //std::shared_ptr
#include <map>
template <typename K, typename V>
class IntervalMap
{
public:
~IntervalMap(){
treemap.clear();
}
void insert(K start, K end, V value)
{
if (start >= end)
return;
// The entry just before the end index
auto tmp = treemap.upper_bound(end);
auto end_prev_entry = tmp == treemap.end() ? tmp : --tmp;
auto added_end = treemap.end();
// If it doesn't exist (empty map)
if(end_prev_entry == treemap.end()){
V v{};
added_end = treemap.insert_or_assign(treemap.begin(), end, v);
}
// Or if it has value different from the insertion
else if(end_prev_entry->second != value)
// Add it back at the end
added_end = treemap.insert_or_assign(end_prev_entry, end, end_prev_entry->second);
// The entry just before the start index
tmp = treemap.upper_bound(start);
auto start_prev_entry = tmp == treemap.end() ? tmp : --tmp;
auto added_start = treemap.end();
// If it has value different from the insertion
if(start_prev_entry == treemap.end() || start_prev_entry->second != value)
// Add the start node of the insertion
added_start = treemap.insert_or_assign(start_prev_entry, start, value);
// Delete everything else inside
// map.erase(start, end) deletes every node with key in the range [start, end)
// The key to start deleting from is the key after the start node we added
// (We don't want to delete a node we just added)
auto del_start = added_start == treemap.end() ? std::next(start_prev_entry) : std::next(added_start);
auto del_end = added_end == treemap.end() ? end_prev_entry : added_end;
auto del_end_next = std::next(del_end);
// If the node after the end is of the same type of the end, delete it
// We cannot just expand del_end (++del_end) otherwise interval limits get messed up
if(del_end != treemap.end() && del_end_next != treemap.end() && del_end->second ==
del_end_next->second) treemap.erase(del_end_next);
// Delete everything in between
if(del_start != treemap.end() && (del_end==treemap.end() || del_start->first <
del_end->first)) treemap.erase(del_start, del_end);
}
void remove(K at)
{
treemap.erase(at);
}
auto at(K index)
{
const auto tmp = treemap.lower_bound(index);
const auto r = tmp != treemap.begin() && tmp->first!=index ? std::prev(tmp) : tmp;
return r;
}
void print()
{
for (auto i = treemap.begin(); i != treemap.end(); i++)
std::cout << i->first << ": " << (int)(i->second) << "\n";
if(!treemap.empty()) std::cout << "end key: " << std::prev(treemap.end())->first << "\n";
}
std::unique_ptr<V[]> toArray(int *length)
{
if (treemap.empty())
{
*length = 0;
return nullptr;
}
const auto &end = std::prev(treemap.end());
*length = end->first;
if(*length == 0) return nullptr;
std::unique_ptr<V[]> arr(new V[*length]);
auto start = treemap.begin();
for (auto i = std::next(treemap.begin()); i != treemap.end(); i++)
{
for (int k = start->first; k < i->first; k++)
arr[k] = start->second;
start = i;
}
return arr;
}
void fromArray(V *arr, int length)
{
treemap.clear();
if (length == 0)
return;
V prev = arr[0];
unsigned int prev_start = 0;
for (unsigned int i = 1; i < length; i++)
{
if (prev != arr[i])
{
insert(prev_start, i, prev);
prev_start = i;
}
prev = arr[i];
}
insert(prev_start, length, prev);
}
auto begin(){
return treemap.begin();
}
auto end(){
return treemap.end();
}
private:
std::map<K, V> treemap{};
};
#endif

15
shaders/shader-texture.gs
View File

@ -26,29 +26,30 @@ void main(){
EmitVertex();
if(gs_in[0].Extents.x == 0){
TexCoord = vec3(0.0, gs_in[0].Extents.z, gs_in[0].BlockType);
TexCoord = vec3(gs_in[0].Extents.z, 0.0, gs_in[0].BlockType);
gl_Position = gl_in[0].gl_Position + vec4(0.0, 0.0, gs_in[0].Extents.z, 0.0);
FragPos = vec3(gl_Position);
gl_Position = projection * view * gl_Position;
EmitVertex();
TexCoord = vec3(gs_in[0].Extents.y, 0.0, gs_in[0].BlockType);
TexCoord = vec3(0.0, gs_in[0].Extents.y, gs_in[0].BlockType);
gl_Position = gl_in[0].gl_Position + vec4(0.0, gs_in[0].Extents.y, 0.0, 0.0);
FragPos = vec3(gl_Position);
gl_Position = projection * view * gl_Position;
EmitVertex();
TexCoord = vec3(gs_in[0].Extents.y, gs_in[0].Extents.z, gs_in[0].BlockType);
TexCoord = vec3(gs_in[0].Extents.z, gs_in[0].Extents.y, gs_in[0].BlockType);
}
else if(gs_in[0].Extents.y == 0){
TexCoord = vec3(0.0, gs_in[0].Extents.z, gs_in[0].BlockType);
gl_Position = gl_in[0].gl_Position + vec4(0.0, 0.0, gs_in[0].Extents.z, 0.0);
TexCoord = vec3(gs_in[0].Extents.x, 0.0, gs_in[0].BlockType);
gl_Position = gl_in[0].gl_Position + vec4(gs_in[0].Extents.x, 0.0, 0.0, 0.0);
FragPos = vec3(gl_Position);
gl_Position = projection * view * gl_Position;
EmitVertex();
TexCoord = vec3(gs_in[0].Extents.x, 0.0, gs_in[0].BlockType);
gl_Position = gl_in[0].gl_Position + vec4(gs_in[0].Extents.x, 0.0, 0.0, 0.0);
TexCoord = vec3(0.0, gs_in[0].Extents.z, gs_in[0].BlockType);
gl_Position = gl_in[0].gl_Position + vec4(0.0, 0.0, gs_in[0].Extents.z, 0.0);
FragPos = vec3(gl_Position);
gl_Position = projection * view * gl_Position;
EmitVertex();