sf ::以错误的方式应用的纹理
在我的2D等距引擎中，我有以下类：
`maps(variable)/layers(variable)/cubes(variable)/sides(6)/points(4)/coordinates(3)`
- 每个
sides包含4points（1point= 1coordinate（x，y， Z））。 - 每个立方体包含6个边。
- 我可以用立方体创建一个我想要的尺寸的地图（相同，我想要的尺寸）。
Folers：
assets/numTexture/numLight.png
我用numTexture和numLight计算一个数字，它是textureNumberEntry（我在数组中加载所有numLight.png（纹理））。
但纹理化的错误是错误的：
我在图层类中定义了立方体坐标：
for(int J = 0; J < mapSize; J++)
{
for(int I = 0; I < mapSize; I++)
{
x = (J - I) * (cubeSize/2);
y = (J + I) * (cubeSize/4);
c = new cube(cubeSize, x, y, z, I, J);
cs.push_back(*c);
}
}
在side.cpp中，我在sideType上有一个开关（如果它是顶部，左边等等......我用不同的方式定义我的点'坐标）。每个立方体我有6个（这里只有数据） 像这样：
switch(typeSide)
{
case 0://DOWN_SIDE
light = 0;
tmp_x = x + (size/2);
tmp_y = y + (size/2);
p0 = new point(tmp_x, tmp_y, tmp_z);
tmp_x = x + size;
tmp_y = y + (3 * (size/4));
p1 = new point(tmp_x, tmp_y, tmp_z);
tmp_x = x + (size/2);
tmp_y = y + size;
p2 = new point(tmp_x, tmp_y, tmp_z);
tmp_x = x;
tmp_y = y + (3 * (size/4));
p3 = new point(tmp_x, tmp_y, tmp_z);
break;
//ETC. ....
功能display（）显示地图：
void GRAPHICS_HANDLER::display()
{
x = 0;
y = 0;
if(maps.size() > 0 && maps[0].layers().size() > 0)//If there is any map and layers to display
{
for(int l = 0; l <= getCurrentLayerID(); l++)//FOR EACH LAYER, WE STOP TO THE CURRENT EDITED LAYER
{
for(unsigned int c = 0; c < maps[currentMapID].layers()[l].cubes().size(); c++)//FOR EACH CUBES
{
if(maps[currentMapID].layers()[l].cubes()[c].getFlat())//If flat mode is enabled: to draw texture like grass, etc...(cf. screen): We draw only one side
{
for(unsigned int p = 0; p < 4; p++)//FOR EACH POINTS
{
//--------------------------------------------------------------------------------------LOAD MAP-----------------------------------------------------------------------------------------------------------//
//--------------------------------------------------------------------------CUBE CLICK DETECTION::TEXTURE CHANGE--------------------------------------------------//
if(cubeClicked || brushMode && currentSelectedCube > -1 && currentSelectedCube < maps[currentMapID].layers()[maps[currentMapID].currentLayerId()].cubes().size())
{
maps[currentMapID].layers()[maps[currentMapID].currentLayerId()].cubes()[currentSelectedCube].setTexture(currentSelectedTexture);
if(!brushMode)
cubeClicked = false;
}
//--------------------------------------------------------------------------CUBE CLICK DETECTION::TEXTURE CHANGE--------------------------------------------------//
//--------------------------------------------------------------------------------------CURSOR - NOT WORKING-----------------------------------------------------------------------------------------------------------------//
//...
//--------------------------------------------------------------------------------------CURSOR - NOT WORKING-----------------------------------------------------------------------------------------------------------------*/
if(enableOffset)
{
x = maps[currentMapID].layers()[l].cubes()[c].sides()[0]->pointPosition(p)[0] + offsetLeft;//it's like doing something like point[p].x + offset left
y = maps[currentMapID].layers()[l].cubes()[c].sides()[0]->pointPosition(p)[1] + offsetTop;
}
else
{
x = maps[currentMapID].layers()[l].cubes()[c].sides()[0]->pointPosition(p)[0];//it's like doing something like point[p].x + offset left
y = maps[currentMapID].layers()[l].cubes()[c].sides()[0]->pointPosition(p)[1];
}
points[p].position = sf::Vector2f(x, y);
points[p].texCoords = sf::Vector2f(x, y);
//--------------------------------------------------------------------------------------GRID-----------------------------------------------------------------------------------------------------------------//
//GRID DISPLAY //MISS AN EDGE .
isoGrid[p].position = points[p].position;
isoGrid[p].color = sf::Color(195, 195, 195, gridOpacity);
//--------------------------------------------------------------------------------------GRID-----------------------------------------------------------------------------------------------------------------//
maps[currentMapID].layers()[l].cubes()[c].sides()[0]->setLight(5);
textureEntryNumber = (maps[currentMapID].layers()[l].cubes()[c].sides()[0]->getTexture() - 1) * 9 + (maps[currentMapID].layers()[l].cubes()[c].sides()[0]->getLight() - 1);//WRONG
//--------------------------------------------------------------------------------------GRID-----------------------------------------------------------------------------------------------------------------//
//--------------------------------------------------------------------------------------LOAD MAP-----------------------------------------------------------------------------------------------------------//
}
//--------------------------------------------------------------------------------------DISPLAY MAP-----------------------------------------------------------------------------------------------------------//
if(grid && maps[currentMapID].layers()[l].cubes()[c].sides()[0]->getTexture() <= 1)//IF GRID = TRUE OR TEXTURE LESS OR EQUAL TO 1 => DISPLAY GRID
{
if(l == maps[currentMapID].currentLayerId())
{
window->draw(isoGrid);
}
}
else if(maps[currentMapID].layers()[l].cubes()[c].sides()[0]->getTexture() > 1)//IF THERE IS ANY TEXTURE TO DISPLAY(>1) => DISPLAY TEXTURE
{
window->draw(points, &textures[textureEntryNumber]);
}
//--------------------------------------------------------------------------------------DISPLAY MAP-----------------------------------------------------------------------------------------------------------//
}
else
{
for(unsigned int s = 0; s < 6; s++)//FOR EACH SIDES(side number will always be 6, no need to make this dynamic
{
for(unsigned int p = 0; p < 4; p++)//FOR EACH POINTS
{
//--------------------------------------------------------------------------------------LOAD MAP-----------------------------------------------------------------------------------------------------------//
//--------------------------------------------------------------------------CUBE CLICK DETECTION::TEXTURE CHANGE--------------------------------------------------//
if(cubeClicked || brushMode && currentSelectedCube > -1 && currentSelectedCube < maps[currentMapID].layers()[maps[currentMapID].currentLayerId()].cubes().size())
{
maps[currentMapID].layers()[maps[currentMapID].currentLayerId()].cubes()[currentSelectedCube].setTexture(currentSelectedTexture);
if(flatMode)
maps[currentMapID].layers()[maps[currentMapID].currentLayerId()].cubes()[currentSelectedCube].setFlat(true);
else
maps[currentMapID].layers()[maps[currentMapID].currentLayerId()].cubes()[currentSelectedCube].setFlat(false);
if(!brushMode)
cubeClicked = false;
}
//--------------------------------------------------------------------------CUBE CLICK DETECTION::TEXTURE CHANGE--------------------------------------------------//
//--------------------------------------------------------------------------------------CURSOR - NOT WORKING-----------------------------------------------------------------------------------------------------------------//
//...
//--------------------------------------------------------------------------------------CURSOR - NOT WORKING-----------------------------------------------------------------------------------------------------------------*/
if(enableOffset)
{
x = maps[currentMapID].layers()[l].cubes()[c].sides()[s]->pointPosition(p)[0] + offsetLeft;//it's like doing something like point[p].x + offset left
y = maps[currentMapID].layers()[l].cubes()[c].sides()[s]->pointPosition(p)[1] + offsetTop;
}
else
{
x = maps[currentMapID].layers()[l].cubes()[c].sides()[s]->pointPosition(p)[0];//it's like doing something like point[p].x + offset left
y = maps[currentMapID].layers()[l].cubes()[c].sides()[s]->pointPosition(p)[1];
}
points[p].position = sf::Vector2f(x, y);
points[p].texCoords = sf::Vector2f(x, y);
//--------------------------------------------------------------------------------------GRID-----------------------------------------------------------------------------------------------------------------//
//GRID DISPLAY //MISS AN EDGE
if(s ==3)
{
isoGrid[p].position = points[p].position;
isoGrid[p].color = sf::Color(195, 195, 195, gridOpacity);
}
//--------------------------------------------------------------------------------------GRID-----------------------------------------------------------------------------------------------------------------//
textureEntryNumber = (maps[currentMapID].layers()[l].cubes()[c].sides()[s]->getTexture() - 1) * 9 + (maps[currentMapID].layers()[l].cubes()[c].sides()[s]->getLight() - 1);//WRONG
//--------------------------------------------------------------------------------------GRID-----------------------------------------------------------------------------------------------------------------//
//--------------------------------------------------------------------------------------LOAD MAP-----------------------------------------------------------------------------------------------------------//
}
//--------------------------------------------------------------------------------------DISPLAY MAP-----------------------------------------------------------------------------------------------------------//
if(grid && maps[currentMapID].layers()[l].cubes()[c].sides()[s]->getTexture() <= 1)//IF GRID = TRUE OR TEXTURE LESS OR EQUAL TO 1 => DISPLAY GRID
{
if(l == maps[currentMapID].currentLayerId())
{
window->draw(isoGrid);
}
}
else if(maps[currentMapID].layers()[l].cubes()[c].sides()[s]->getTexture() > 1)//IF THERE IS ANY TEXTURE TO DISPLAY(>1) => DISPLAY TEXTURE
{
window->draw(points, &textures[textureEntryNumber]);
}
//--------------------------------------------------------------------------------------DISPLAY MAP-----------------------------------------------------------------------------------------------------------//
}
}
}
}
}
window->display();
}
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问题：
- 纹理只有在带有细节的纹理时才会放大，一个颜色纹理没有问题（可能是顶点连在一起，甚至来自不同的
sf::VertexArray。
注意：类如地图/图层/立方体/等。 ......只是数据。
应在屏幕上显示的纹理（numLIght）图像如下所示：
编辑：当图片只是一种颜色时，纹理会起作用，没有细节：
我不知道我的代码出了什么问题。也许，我将重新编码函数display（）...
1 个答案:
答案 0 :(得分：3)
看起来纹理坐标可能在纹理之外。
如果pointPosition函数引用side.cpp中的p0，p1，p2和p3点，那么它看起来也像是将这些点用作纹理坐标。
考虑如何创建2D方块 -
//Create a VertexArray as quads.
sf::VertexArray vertices;
vertices.setPrimitiveType(sf::Quads);
vertices.resize(4);
//The square position values (same as sf::Vertex::position).
sf::Vector2f v0 = sf::Vector2f(10, 10);
sf::Vector2f v1 = sf::Vector2f(200, 10);
sf::Vector2f v2 = sf::Vector2f(200, 200);
sf::Vector2f v3 = sf::Vector2f(10, 200);
//The texture coordinates (same as sf::Vertex::texCoords).
sf::Vector2f tv0 = sf::Vector2f(0, 0 );
sf::Vector2f tv1 = sf::Vector2f(0+tex.getSize().x, 0 );
sf::Vector2f tv2 = sf::Vector2f(0+tex.getSize().x, tex.getSize().y);
sf::Vector2f tv3 = sf::Vector2f(0, tex.getSize().y);
//Put them in vertices.
vertices[0] = sf::Vertex(v0,tv0);
vertices[1] = sf::Vertex(v1,tv1);
vertices[2] = sf::Vertex(v2,tv2);
vertices[3] = sf::Vertex(v3,tv3);
方形点不必与纹理坐标相同，因为纹理坐标将延伸到每个方形点。如果你要改变其中一个方形点的点，它可能看起来像这样。
在
之后（v2改为200,300）
我们根本不需要改变纹理坐标，只需要改变顶点位置。
我不确定这究竟是什么，因为我看不到pointPosition是什么，但这是我最好的猜测。
此外，尝试在纹理外部绘制可能会导致它看起来像图像的边框像素被拉伸（可能在您的示例中发生了什么），有时您甚至可以将视频内存中的其他信息显示为超越纹理记忆的结果。
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