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authorLaG1924 <12997935+LaG1924@users.noreply.github.com>2017-06-20 16:25:21 +0200
committerLaG1924 <12997935+LaG1924@users.noreply.github.com>2017-06-20 16:25:21 +0200
commitba2e09672bf88ed1016fc82bd88ac87df0a5b3a1 (patch)
tree3d3308541e5350d4639e217cb519fe55a34f6c45 /src/graphics/Frustrum.cpp
parent2017-06-17 (diff)
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-rw-r--r--src/graphics/Frustrum.cpp111
1 files changed, 0 insertions, 111 deletions
diff --git a/src/graphics/Frustrum.cpp b/src/graphics/Frustrum.cpp
deleted file mode 100644
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--- a/src/graphics/Frustrum.cpp
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-#include "Frustrum.hpp"
-
-enum FrustumSide {
- RIGHT = 0, // The RIGHT side of the frustum
- LEFT = 1, // The LEFT side of the frustum
- BOTTOM = 2, // The BOTTOM side of the frustum
- TOP = 3, // The TOP side of the frustum
- BACK = 4, // The BACK side of the frustum
- FRONT = 5 // The FRONT side of the frustum
-};
-
-enum PlaneData {
- A = 0, // The X value of the plane's normal
- B = 1, // The Y value of the plane's normal
- C = 2, // The Z value of the plane's normal
- D = 3 // The distance the plane is from the origin
-};
-
-void normalizePlane(glm::vec4 &frustum_plane) {
- float magnitude = (float) sqrt(frustum_plane[A] * frustum_plane[A] + frustum_plane[B] * frustum_plane[B] +
- frustum_plane[C] * frustum_plane[C]);
- frustum_plane[A] /= magnitude;
- frustum_plane[B] /= magnitude;
- frustum_plane[C] /= magnitude;
- frustum_plane[D] /= magnitude;
-}
-
-void Frustum::CalculateFrustum(glm::mat4 &view_matrix, glm::mat4 &proj_matrix) {
- float proj[16];
- float modl[16];
- const float *projP = glm::value_ptr(proj_matrix);
- const float *modlP = glm::value_ptr(view_matrix);
- for (int i = 0; i < 16; i++) {
- proj[i]=projP[i];
- modl[i]=modlP[i];
- }
-
- float clip[16]; //clipping planes
-
- clip[0] = modl[0] * proj[0] + modl[1] * proj[4] + modl[2] * proj[8] + modl[3] * proj[12];
- clip[1] = modl[0] * proj[1] + modl[1] * proj[5] + modl[2] * proj[9] + modl[3] * proj[13];
- clip[2] = modl[0] * proj[2] + modl[1] * proj[6] + modl[2] * proj[10] + modl[3] * proj[14];
- clip[3] = modl[0] * proj[3] + modl[1] * proj[7] + modl[2] * proj[11] + modl[3] * proj[15];
-
- clip[4] = modl[4] * proj[0] + modl[5] * proj[4] + modl[6] * proj[8] + modl[7] * proj[12];
- clip[5] = modl[4] * proj[1] + modl[5] * proj[5] + modl[6] * proj[9] + modl[7] * proj[13];
- clip[6] = modl[4] * proj[2] + modl[5] * proj[6] + modl[6] * proj[10] + modl[7] * proj[14];
- clip[7] = modl[4] * proj[3] + modl[5] * proj[7] + modl[6] * proj[11] + modl[7] * proj[15];
-
- clip[8] = modl[8] * proj[0] + modl[9] * proj[4] + modl[10] * proj[8] + modl[11] * proj[12];
- clip[9] = modl[8] * proj[1] + modl[9] * proj[5] + modl[10] * proj[9] + modl[11] * proj[13];
- clip[10] = modl[8] * proj[2] + modl[9] * proj[6] + modl[10] * proj[10] + modl[11] * proj[14];
- clip[11] = modl[8] * proj[3] + modl[9] * proj[7] + modl[10] * proj[11] + modl[11] * proj[15];
-
- clip[12] = modl[12] * proj[0] + modl[13] * proj[4] + modl[14] * proj[8] + modl[15] * proj[12];
- clip[13] = modl[12] * proj[1] + modl[13] * proj[5] + modl[14] * proj[9] + modl[15] * proj[13];
- clip[14] = modl[12] * proj[2] + modl[13] * proj[6] + modl[14] * proj[10] + modl[15] * proj[14];
- clip[15] = modl[12] * proj[3] + modl[13] * proj[7] + modl[14] * proj[11] + modl[15] * proj[15];
-
- frustum_planes[RIGHT][A] = clip[3] - clip[0];
- frustum_planes[RIGHT][B] = clip[7] - clip[4];
- frustum_planes[RIGHT][C] = clip[11] - clip[8];
- frustum_planes[RIGHT][D] = clip[15] - clip[12];
- normalizePlane(frustum_planes[RIGHT]);
-
- frustum_planes[LEFT][A] = clip[3] + clip[0];
- frustum_planes[LEFT][B] = clip[7] + clip[4];
- frustum_planes[LEFT][C] = clip[11] + clip[8];
- frustum_planes[LEFT][D] = clip[15] + clip[12];
- normalizePlane(frustum_planes[LEFT]);
-
- frustum_planes[BOTTOM][A] = clip[3] + clip[1];
- frustum_planes[BOTTOM][B] = clip[7] + clip[5];
- frustum_planes[BOTTOM][C] = clip[11] + clip[9];
- frustum_planes[BOTTOM][D] = clip[15] + clip[13];
- normalizePlane(frustum_planes[BOTTOM]);
-
- frustum_planes[TOP][A] = clip[3] - clip[1];
- frustum_planes[TOP][B] = clip[7] - clip[5];
- frustum_planes[TOP][C] = clip[11] - clip[9];
- frustum_planes[TOP][D] = clip[15] - clip[13];
- normalizePlane(frustum_planes[TOP]);
-
- frustum_planes[BACK][A] = clip[3] - clip[2];
- frustum_planes[BACK][B] = clip[7] - clip[6];
- frustum_planes[BACK][C] = clip[11] - clip[10];
- frustum_planes[BACK][D] = clip[15] - clip[14];
- normalizePlane(frustum_planes[BACK]);
-
- frustum_planes[FRONT][A] = clip[3] + clip[2];
- frustum_planes[FRONT][B] = clip[7] + clip[6];
- frustum_planes[FRONT][C] = clip[11] + clip[10];
- frustum_planes[FRONT][D] = clip[15] + clip[14];
- normalizePlane(frustum_planes[FRONT]);
-}
-
-bool Frustum::TestInsideFrustrum(glm::vec4 Min, glm::vec4 Max) {
- bool inside = true;
- //test all 6 frustum planes
- for (int i = 0; i < 6; i++) {
- //pick closest point to plane and check if it behind the plane
- //if yes - object outside frustum
- float d = std::max(Min.x * frustum_planes[i].x, Max.x * frustum_planes[i].x)
- + std::max(Min.y * frustum_planes[i].y, Max.y * frustum_planes[i].y)
- + std::max(Min.z * frustum_planes[i].z, Max.z * frustum_planes[i].z)
- + frustum_planes[i].w;
- inside &= d > 0;
- //return false; //with flag works faster
- }
- return inside;
-}