allemang.d/toddcox-visualize
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add basic 4d rotation matrix utility

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This commit is contained in:
David Allemang
2020-01-10 16:09:01 -05:00
parent 9989933853
commit 214f54fe89
2 changed files with 16 additions and 4 deletions
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9
vis/include/mirror.hpp
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@@ -105,3 +105,12 @@ std::vector<glm::vec4> plane_intersections(std::vector<glm::vec4> normals) {
return results; return results;
} }
glm::mat4 utilRotate(const int u, const int v, const float theta) {
auto res = glm::identity<glm::mat4>();
res[u][u] = std::cos(theta);
res[u][v] = std::sin(theta);
res[v][u] = -std::sin(theta);
res[v][v] = std::cos(theta);
return res;
}

11
vis/src/main.cpp
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@@ -92,11 +92,14 @@ int main(int argc, char *argv[]) {
glm::mat4 proj = glm::ortho(-pwidth, pwidth, -pheight, pheight, -100.0f, 100.0f); glm::mat4 proj = glm::ortho(-pwidth, pwidth, -pheight, pheight, -100.0f, 100.0f);
glUniformMatrix4fv(0, 1, false, glm::value_ptr(proj)); glUniformMatrix4fv(0, 1, false, glm::value_ptr(proj));
auto t = (float) glfwGetTime() / 3; auto t = (float) glfwGetTime() / 5;
auto view = glm::identity<glm::mat4>(); auto view = glm::identity<glm::mat4>();
view = glm::rotate(view, t / 1, glm::vec3(0, 1, 0)); view *= utilRotate(0, 1, t * 0.7f);
view = glm::rotate(view, t / 3, glm::vec3(0, 0, 1)); view *= utilRotate(0, 2, t * 0.8f);
view = glm::rotate(view, t / 4, glm::vec3(1, 0, 0)); view *= utilRotate(0, 3, t * 1.0f);
view *= utilRotate(1, 2, -t * 1.1f);
view *= utilRotate(1, 3, -t * 0.3f);
view *= utilRotate(2, 3, -t * 1.2f);
glUniformMatrix4fv(1, 1, false, glm::value_ptr(view)); glUniformMatrix4fv(1, 1, false, glm::value_ptr(view));
//endregion //endregion