lpnf
/
lovr
mirror of https://github.com/bjornbytes/lovr.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Buffer:setVertexAttribute;

This commit is contained in:
bjorn 2016-11-20 22:24:57 -08:00
parent b557791800
commit 8892b03590
2 changed files with 73 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
src/lovr/types/buffer.c
View File

@ -34,6 +34,8 @@ const luaL_Reg lovrBuffer[] = {
{ "getVertexCount", l_lovrBufferGetVertexCount },
{ "getVertex", l_lovrBufferGetVertex },
{ "setVertex", l_lovrBufferSetVertex },
{ "getVertexAttribute", l_lovrBufferGetVertexAttribute },
{ "setVertexAttribute", l_lovrBufferSetVertexAttribute },
{ "setVertices", l_lovrBufferSetVertices },
{ "getVertexMap", l_lovrBufferGetVertexMap },
{ "setVertexMap", l_lovrBufferSetVertexMap },
@ -132,6 +134,75 @@ int l_lovrBufferSetVertex(lua_State* L) {
return 0;
}
int l_lovrBufferGetVertexAttribute(lua_State* L) {
Buffer* buffer = luax_checktype(L, 1, Buffer);
int vertexIndex = luaL_checkint(L, 2) - 1;
int attributeIndex = luaL_checkint(L, 3) - 1;
char* vertex = lovrBufferGetScratchVertex(buffer);
lovrBufferGetVertex(buffer, vertexIndex, vertex);
BufferFormat format = lovrBufferGetVertexFormat(buffer);
if (vertexIndex < 0 || vertexIndex >= buffer->size) {
return luaL_error(L, "Invalid buffer vertex index: %d", vertexIndex + 1);
} else if (attributeIndex < 0 || attributeIndex >= format.length) {
return luaL_error(L, "Invalid buffer attribute index: %d", attributeIndex + 1);
}
BufferAttribute attribute;
for (int i = 0; i <= attributeIndex; i++) {
attribute = format.data[i];
if (i == attributeIndex) {
for (int j = 0; j < attribute.count; j++) {
switch (attribute.type) {
case BUFFER_FLOAT: lua_pushnumber(L, *((float*) vertex)); break;
case BUFFER_BYTE: lua_pushinteger(L, *((unsigned char*) vertex)); break;
case BUFFER_INT: lua_pushinteger(L, *((int*) vertex)); break;
}
vertex += sizeof(attribute.type);
}
} else {
vertex += attribute.count * sizeof(attribute.type);
}
}
return attribute.count;
}
int l_lovrBufferSetVertexAttribute(lua_State* L) {
Buffer* buffer = luax_checktype(L, 1, Buffer);
int vertexIndex = luaL_checkint(L, 2) - 1;
int attributeIndex = luaL_checkint(L, 3) - 1;
char* vertex = lovrBufferGetScratchVertex(buffer);
lovrBufferGetVertex(buffer, vertexIndex, vertex);
BufferFormat format = lovrBufferGetVertexFormat(buffer);
if (vertexIndex < 0 || vertexIndex >= buffer->size) {
return luaL_error(L, "Invalid buffer vertex index: %d", vertexIndex + 1);
} else if (attributeIndex < 0 || attributeIndex >= format.length) {
return luaL_error(L, "Invalid buffer attribute index: %d", attributeIndex + 1);
}
int arg = 4;
for (int i = 0; i <= attributeIndex; i++) {
BufferAttribute attribute = format.data[i];
if (i == attributeIndex) {
for (int j = 0; j < attribute.count; j++) {
switch (attribute.type) {
case BUFFER_FLOAT: *((float*) vertex) = luaL_optnumber(L, arg++, 0.f); break;
case BUFFER_BYTE: *((unsigned char*) vertex) = luaL_optint(L, arg++, 255); break;
case BUFFER_INT: *((int*) vertex) = luaL_optint(L, arg++, 0); break;
}
vertex += sizeof(attribute.type);
}
} else {
vertex += attribute.count * sizeof(attribute.type);
}
}
lovrBufferSetVertex(buffer, vertexIndex, lovrBufferGetScratchVertex(buffer));
return 0;
}
int l_lovrBufferSetVertices(lua_State* L) {
Buffer* buffer = luax_checktype(L, 1, Buffer);
BufferFormat format = lovrBufferGetVertexFormat(buffer);

2
src/lovr/types/buffer.h
View File

@ -10,6 +10,8 @@ int l_lovrBufferDraw(lua_State* L);
int l_lovrBufferGetVertexCount(lua_State* L);
int l_lovrBufferGetVertex(lua_State* L);
int l_lovrBufferSetVertex(lua_State* L);
int l_lovrBufferGetVertexAttribute(lua_State* L);
int l_lovrBufferSetVertexAttribute(lua_State* L);
int l_lovrBufferSetVertices(lua_State* L);
int l_lovrBufferGetVertexMap(lua_State* L);
int l_lovrBufferSetVertexMap(lua_State* L);