所以我有一个二维数组,它充当要绘制的图块的地图。
int sMap[12][20] = {
{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
{1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1},
{1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1},
{1, 0, 1, 0, 1, 2, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1},
{1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 1},
{1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
{1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1},
{1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 2, 0, 0, 1, 0, 0, 0, 1},
{1, 1, 0, 0, 0, 0, 0, 1, 2, 1, 0, 0, 1, 0, 1, 1, 2, 2, 2, 1},
{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1},
{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
};
一旦我的瓷砖被加载,我用它function()
来放置瓷砖:
for (int y = 0; y < 12; y++){
for (int x = 0; x < 20; x++){
if (sMap[y][x] == 1)
glBindTexture( GL_TEXTURE_2D, brick1);
else if (sMap[y][x] == 2)
glBindTexture( GL_TEXTURE_2D, brick2);
else
glBindTexture( GL_TEXTURE_2D, wall );
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(float(x + offsetx), float(MAP_SIZEY - (y + offsety)), 0.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f(float(x + 1 + offsetx), float(MAP_SIZEY - (y + offsety)), 0.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(float(x + 1 + offsetx), float(MAP_SIZEY - (y + 1 + offsety)), 0.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(float(x + offsetx), float(MAP_SIZEY - (y + 1 + offsety)), 0.0f);
glEnd();
}
}
我想我可能对瓷砖的坐标系感到困惑,因为当我绘制一个OpenGL
充当精灵的基本正方形时,我在运行程序时会出现黑屏。
我不确定这是否意味着精灵对瓷砖的比例是错误的,或者精灵和瓷砖是否在不同的Z
平面上......
如果有人能解释坐标系,我将不胜感激,以防我没有像我想象的那样理解它,并建议我如何OpenGL
在相同的坐标上画一个正方形。
目前我有这个来绘制我的基本精灵:
struct RECT{float x, y, w, h;};
RECT sprite = {0, 0, 10, 10};
void drawSprite (RECT rect){
glBegin(GL_QUADS);
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(rect.x, rect.y, 0.0);
glVertex3f(rect.x, rect.y+rect.h, 0.0);
glVertex3f(rect.x+rect.w, rect.y+rect.h, 0.0);
glVertex3f(rect.x+rect.w, rect.y, 0.0);
glEnd();
}
编辑:
调整屏幕大小:
glViewport(0,0,width,height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,20.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
绘制场景:
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
gluLookAt(10.0f, 8.0f, 20.0f, 10.0f, 8.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glTranslatef(5.0f,4.0f,0.0f);
draw_tiles();
draw_sprite();