X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=Source%2FFrustum.cpp;h=84d4b8def826429125c09983ee0f14d49f6b3148;hb=24004d6ab1e68faaf85ece11b566449997da5013;hp=f8fb2f51758380d9e169cd464a27715d9c087c80;hpb=1eec4500c708d0619abf36759454f59fa175cacf;p=lugaru.git diff --git a/Source/Frustum.cpp b/Source/Frustum.cpp index f8fb2f5..84d4b8d 100644 --- a/Source/Frustum.cpp +++ b/Source/Frustum.cpp @@ -10,7 +10,7 @@ of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. @@ -26,150 +26,154 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. void FRUSTUM:: - GetFrustum() { - static float projmatrix[16]; - static float mvmatrix[16]; - static float clip[16]; - - glGetFloatv(GL_PROJECTION_MATRIX, projmatrix); - glGetFloatv(GL_MODELVIEW_MATRIX, mvmatrix); - - // Combine the matrices - clip[0] = mvmatrix[0] * projmatrix[0] + mvmatrix[1] * projmatrix[4] + mvmatrix[2] * projmatrix[8] + mvmatrix[3] * projmatrix[12]; - clip[1] = mvmatrix[0] * projmatrix[1] + mvmatrix[1] * projmatrix[5] + mvmatrix[2] * projmatrix[9] + mvmatrix[3] * projmatrix[13]; - clip[2] = mvmatrix[0] * projmatrix[2] + mvmatrix[1] * projmatrix[6] + mvmatrix[2] * projmatrix[10] + mvmatrix[3] * projmatrix[14]; - clip[3] = mvmatrix[0] * projmatrix[3] + mvmatrix[1] * projmatrix[7] + mvmatrix[2] * projmatrix[11] + mvmatrix[3] * projmatrix[15]; - - clip[4] = mvmatrix[4] * projmatrix[0] + mvmatrix[5] * projmatrix[4] + mvmatrix[6] * projmatrix[8] + mvmatrix[7] * projmatrix[12]; - clip[5] = mvmatrix[4] * projmatrix[1] + mvmatrix[5] * projmatrix[5] + mvmatrix[6] * projmatrix[9] + mvmatrix[7] * projmatrix[13]; - clip[6] = mvmatrix[4] * projmatrix[2] + mvmatrix[5] * projmatrix[6] + mvmatrix[6] * projmatrix[10] + mvmatrix[7] * projmatrix[14]; - clip[7] = mvmatrix[4] * projmatrix[3] + mvmatrix[5] * projmatrix[7] + mvmatrix[6] * projmatrix[11] + mvmatrix[7] * projmatrix[15]; - - clip[8] = mvmatrix[8] * projmatrix[0] + mvmatrix[9] * projmatrix[4] + mvmatrix[10] * projmatrix[8] + mvmatrix[11] * projmatrix[12]; - clip[9] = mvmatrix[8] * projmatrix[1] + mvmatrix[9] * projmatrix[5] + mvmatrix[10] * projmatrix[9] + mvmatrix[11] * projmatrix[13]; - clip[10] = mvmatrix[8] * projmatrix[2] + mvmatrix[9] * projmatrix[6] + mvmatrix[10] * projmatrix[10] + mvmatrix[11] * projmatrix[14]; - clip[11] = mvmatrix[8] * projmatrix[3] + mvmatrix[9] * projmatrix[7] + mvmatrix[10] * projmatrix[11] + mvmatrix[11] * projmatrix[15]; - - clip[12] = mvmatrix[12] * projmatrix[0] + mvmatrix[13] * projmatrix[4] + mvmatrix[14] * projmatrix[8] + mvmatrix[15] * projmatrix[12]; - clip[13] = mvmatrix[12] * projmatrix[1] + mvmatrix[13] * projmatrix[5] + mvmatrix[14] * projmatrix[9] + mvmatrix[15] * projmatrix[13]; - clip[14] = mvmatrix[12] * projmatrix[2] + mvmatrix[13] * projmatrix[6] + mvmatrix[14] * projmatrix[10] + mvmatrix[15] * projmatrix[14]; - clip[15] = mvmatrix[12] * projmatrix[3] + mvmatrix[13] * projmatrix[7] + mvmatrix[14] * projmatrix[11] + mvmatrix[15] * projmatrix[15]; - - // Right plane - frustum[0][0] = clip[3] - clip[0]; - frustum[0][1] = clip[7] - clip[4]; - frustum[0][2] = clip[11] - clip[8]; - frustum[0][3] = clip[15] - clip[12]; - - // Left plane - frustum[1][0] = clip[3] + clip[0]; - frustum[1][1] = clip[7] + clip[4]; - frustum[1][2] = clip[11] + clip[8]; - frustum[1][3] = clip[15] + clip[12]; - - // Bottom plane - frustum[2][0] = clip[3] + clip[1]; - frustum[2][1] = clip[7] + clip[5]; - frustum[2][2] = clip[11] + clip[9]; - frustum[2][3] = clip[15] + clip[13]; - - // Top plane - frustum[3][0] = clip[3] - clip[1]; - frustum[3][1] = clip[7] - clip[5]; - frustum[3][2] = clip[11] - clip[9]; - frustum[3][3] = clip[15] - clip[13]; - - // Far plane - frustum[4][0] = clip[3] - clip[2]; - frustum[4][1] = clip[7] - clip[6]; - frustum[4][2] = clip[11] - clip[10]; - frustum[4][3] = clip[15] - clip[14]; - - // Near plane - frustum[5][0] = clip[3] + clip[2]; - frustum[5][1] = clip[7] + clip[6]; - frustum[5][2] = clip[11] + clip[10]; - frustum[5][3] = clip[15] + clip[14]; +GetFrustum() +{ + static float projmatrix[16]; + static float mvmatrix[16]; + static float clip[16]; + + glGetFloatv(GL_PROJECTION_MATRIX, projmatrix); + glGetFloatv(GL_MODELVIEW_MATRIX, mvmatrix); + + // Combine the matrices + clip[0] = mvmatrix[0] * projmatrix[0] + mvmatrix[1] * projmatrix[4] + mvmatrix[2] * projmatrix[8] + mvmatrix[3] * projmatrix[12]; + clip[1] = mvmatrix[0] * projmatrix[1] + mvmatrix[1] * projmatrix[5] + mvmatrix[2] * projmatrix[9] + mvmatrix[3] * projmatrix[13]; + clip[2] = mvmatrix[0] * projmatrix[2] + mvmatrix[1] * projmatrix[6] + mvmatrix[2] * projmatrix[10] + mvmatrix[3] * projmatrix[14]; + clip[3] = mvmatrix[0] * projmatrix[3] + mvmatrix[1] * projmatrix[7] + mvmatrix[2] * projmatrix[11] + mvmatrix[3] * projmatrix[15]; + + clip[4] = mvmatrix[4] * projmatrix[0] + mvmatrix[5] * projmatrix[4] + mvmatrix[6] * projmatrix[8] + mvmatrix[7] * projmatrix[12]; + clip[5] = mvmatrix[4] * projmatrix[1] + mvmatrix[5] * projmatrix[5] + mvmatrix[6] * projmatrix[9] + mvmatrix[7] * projmatrix[13]; + clip[6] = mvmatrix[4] * projmatrix[2] + mvmatrix[5] * projmatrix[6] + mvmatrix[6] * projmatrix[10] + mvmatrix[7] * projmatrix[14]; + clip[7] = mvmatrix[4] * projmatrix[3] + mvmatrix[5] * projmatrix[7] + mvmatrix[6] * projmatrix[11] + mvmatrix[7] * projmatrix[15]; + + clip[8] = mvmatrix[8] * projmatrix[0] + mvmatrix[9] * projmatrix[4] + mvmatrix[10] * projmatrix[8] + mvmatrix[11] * projmatrix[12]; + clip[9] = mvmatrix[8] * projmatrix[1] + mvmatrix[9] * projmatrix[5] + mvmatrix[10] * projmatrix[9] + mvmatrix[11] * projmatrix[13]; + clip[10] = mvmatrix[8] * projmatrix[2] + mvmatrix[9] * projmatrix[6] + mvmatrix[10] * projmatrix[10] + mvmatrix[11] * projmatrix[14]; + clip[11] = mvmatrix[8] * projmatrix[3] + mvmatrix[9] * projmatrix[7] + mvmatrix[10] * projmatrix[11] + mvmatrix[11] * projmatrix[15]; + + clip[12] = mvmatrix[12] * projmatrix[0] + mvmatrix[13] * projmatrix[4] + mvmatrix[14] * projmatrix[8] + mvmatrix[15] * projmatrix[12]; + clip[13] = mvmatrix[12] * projmatrix[1] + mvmatrix[13] * projmatrix[5] + mvmatrix[14] * projmatrix[9] + mvmatrix[15] * projmatrix[13]; + clip[14] = mvmatrix[12] * projmatrix[2] + mvmatrix[13] * projmatrix[6] + mvmatrix[14] * projmatrix[10] + mvmatrix[15] * projmatrix[14]; + clip[15] = mvmatrix[12] * projmatrix[3] + mvmatrix[13] * projmatrix[7] + mvmatrix[14] * projmatrix[11] + mvmatrix[15] * projmatrix[15]; + + // Right plane + frustum[0][0] = clip[3] - clip[0]; + frustum[0][1] = clip[7] - clip[4]; + frustum[0][2] = clip[11] - clip[8]; + frustum[0][3] = clip[15] - clip[12]; + + // Left plane + frustum[1][0] = clip[3] + clip[0]; + frustum[1][1] = clip[7] + clip[4]; + frustum[1][2] = clip[11] + clip[8]; + frustum[1][3] = clip[15] + clip[12]; + + // Bottom plane + frustum[2][0] = clip[3] + clip[1]; + frustum[2][1] = clip[7] + clip[5]; + frustum[2][2] = clip[11] + clip[9]; + frustum[2][3] = clip[15] + clip[13]; + + // Top plane + frustum[3][0] = clip[3] - clip[1]; + frustum[3][1] = clip[7] - clip[5]; + frustum[3][2] = clip[11] - clip[9]; + frustum[3][3] = clip[15] - clip[13]; + + // Far plane + frustum[4][0] = clip[3] - clip[2]; + frustum[4][1] = clip[7] - clip[6]; + frustum[4][2] = clip[11] - clip[10]; + frustum[4][3] = clip[15] - clip[14]; + + // Near plane + frustum[5][0] = clip[3] + clip[2]; + frustum[5][1] = clip[7] + clip[6]; + frustum[5][2] = clip[11] + clip[10]; + frustum[5][3] = clip[15] + clip[14]; } int FRUSTUM:: - CubeInFrustum(float x, float y, float z, float size) { - static int c, c2; - - for(int i=0; i<6; i++) { - c=0; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y-size) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y-size) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y+size) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y+size) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y-size) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y-size) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y+size) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y+size) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(c==0) - return 0; - if(c==8) - c2++; - } - if(c2>=6) - return 2; - else - return 1; +CubeInFrustum(float x, float y, float z, float size) +{ + static int c, c2; + + for (int i = 0; i < 6; i++) { + c = 0; + if (frustum[i][0] * (x - size) + frustum[i][1] * (y - size) + frustum[i][2] * (z - size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x + size) + frustum[i][1] * (y - size) + frustum[i][2] * (z - size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x - size) + frustum[i][1] * (y + size) + frustum[i][2] * (z - size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x + size) + frustum[i][1] * (y + size) + frustum[i][2] * (z - size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x - size) + frustum[i][1] * (y - size) + frustum[i][2] * (z + size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x + size) + frustum[i][1] * (y - size) + frustum[i][2] * (z + size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x - size) + frustum[i][1] * (y + size) + frustum[i][2] * (z + size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x + size) + frustum[i][1] * (y + size) + frustum[i][2] * (z + size) + frustum[i][3] > 0) + c++; + if (c == 0) + return 0; + if (c == 8) + c2++; + } + if (c2 >= 6) + return 2; + else + return 1; } int FRUSTUM:: - CubeInFrustum(float x, float y, float z, float size, float height) { - static int c, c2; - - for(int i=0; i<6; i++) { - c=0; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y-height) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y-height) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y+height) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y+height) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y-height) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y-height) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y+height) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y+height) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(c==0) - return 0; - if(c==8) - c2++; - } - if(c2>=6) - return 2; - else - return 1; +CubeInFrustum(float x, float y, float z, float size, float height) +{ + static int c, c2; + + for (int i = 0; i < 6; i++) { + c = 0; + if (frustum[i][0] * (x - size) + frustum[i][1] * (y - height) + frustum[i][2] * (z - size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x + size) + frustum[i][1] * (y - height) + frustum[i][2] * (z - size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x - size) + frustum[i][1] * (y + height) + frustum[i][2] * (z - size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x + size) + frustum[i][1] * (y + height) + frustum[i][2] * (z - size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x - size) + frustum[i][1] * (y - height) + frustum[i][2] * (z + size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x + size) + frustum[i][1] * (y - height) + frustum[i][2] * (z + size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x - size) + frustum[i][1] * (y + height) + frustum[i][2] * (z + size) + frustum[i][3] > 0) + c++; + if (frustum[i][0] * (x + size) + frustum[i][1] * (y + height) + frustum[i][2] * (z + size) + frustum[i][3] > 0) + c++; + if (c == 0) + return 0; + if (c == 8) + c2++; + } + if (c2 >= 6) + return 2; + else + return 1; } int FRUSTUM:: - SphereInFrustum(float x, float y, float z, float radius) { - static int c2; - - for(int i=0; i<6; i++) { - if(frustum[i][0] * x + frustum[i][1] * y + frustum[i][2] * z + frustum[i][3] > -1*radius) - c2++; - else - return 0; - } - if(c2>=6) - return 2; - else - return 1; +SphereInFrustum(float x, float y, float z, float radius) +{ + static int c2; + + for (int i = 0; i < 6; i++) { + if (frustum[i][0] * x + frustum[i][1] * y + frustum[i][2] * z + frustum[i][3] > -1 * radius) + c2++; + else + return 0; + } + if (c2 >= 6) + return 2; + else + return 1; }