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https://github.com/zhenyan121/Cubed.git
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1a26474a05
* feat: add cave generate * fix: incorrect blocks on cave surface * fix: non-deterministic cave generator * refactor: move all chunk generation to dedicated generation thread * refactor: remove inital cave * feat: add cave parameter adjustment * refactor: adjust cave probability
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
#include "Cubed/tools/math_tools.hpp"
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#include <algorithm>
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#include <glm/gtc/type_ptr.hpp>
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namespace Cubed {
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namespace Math {
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void extract_frustum_planes(const glm::mat4& mvp_matrix,
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std::vector<glm::vec4>& planes) {
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if (planes.size() != 6) {
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planes.resize(6);
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}
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const float* m = glm::value_ptr(mvp_matrix);
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// left plane
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planes[0] =
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glm::vec4(m[3] + m[0], m[7] + m[4], m[11] + m[8], m[15] + m[12]);
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// right plane
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planes[1] =
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glm::vec4(m[3] - m[0], m[7] - m[4], m[11] - m[8], m[15] - m[12]);
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// bottom plane
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planes[2] =
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glm::vec4(m[3] + m[1], m[7] + m[5], m[11] + m[9], m[15] + m[13]);
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// top plane
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planes[3] =
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glm::vec4(m[3] - m[1], m[7] - m[5], m[11] - m[9], m[15] - m[13]);
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// near plane
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planes[4] =
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glm::vec4(m[3] + m[2], m[7] + m[6], m[11] + m[10], m[15] + m[14]);
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// far plane
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planes[5] =
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glm::vec4(m[3] - m[2], m[7] - m[6], m[11] - m[10], m[15] - m[14]);
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for (auto& p : planes) {
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p = glm::normalize(p);
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}
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}
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float smootherstep(float edge0, float edge1, float x) {
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x = std::clamp((x - edge0) / (edge1 - edge0), 0.0f, 1.0f);
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return x * x * x * (x * (6.0f * x - 15.0f) + 10.0f);
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}
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} // namespace Math
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} // namespace Cubed
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