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add ModelBuilder

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This commit is contained in:
MihailRis 2026-01-08 18:26:19 +03:00
parent 8fc83c08e2
commit 3cb388eef0
3 changed files with 159 additions and 25 deletions
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37
src/graphics/commons/Model.cpp
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@ -1,6 +1,10 @@
#define GLM_ENABLE_EXPERIMENTAL
#include "Model.hpp"
#include <algorithm>
#include <glm/gtc/quaternion.hpp>
#include <glm/gtx/matrix_decompose.hpp>
using namespace model;
@ -71,6 +75,39 @@ void Mesh::addRect(
vertices.push_back({pos-right+up, {uv.u1, uv.v2}, norm});
}
static glm::mat4 extract_rotation(const glm::mat4& matrix) {
glm::vec3 scale;
glm::quat rotation;
glm::vec3 translation;
glm::vec3 skew;
glm::vec4 perspective;
glm::decompose(matrix, scale, rotation, translation, skew, perspective);
return glm::mat4_cast(rotation);
}
void Mesh::addRect(
const glm::vec3& pos,
const glm::vec3& right,
const glm::vec3& up,
const glm::vec3& norm,
const UVRegion& uv,
const glm::mat4& transform
) {
auto a = transform * glm::vec4(pos - right - up, 1.0f);
auto b = transform * glm::vec4(pos + right - up, 1.0f);
auto c = transform * glm::vec4(pos + right + up, 1.0f);
auto d = transform * glm::vec4(pos - right + up, 1.0f);
auto tsfnorm = extract_rotation(transform) * glm::vec4(norm, 1.0f);
vertices.push_back({a, {uv.u1, uv.v1}, tsfnorm});
vertices.push_back({b, {uv.u2, uv.v1}, tsfnorm});
vertices.push_back({c, {uv.u2, uv.v2}, tsfnorm});
vertices.push_back({a, {uv.u1, uv.v1}, tsfnorm});
vertices.push_back({c, {uv.u2, uv.v2}, tsfnorm});
vertices.push_back({d, {uv.u1, uv.v2}, tsfnorm});
}
void Mesh::addBox(const glm::vec3& pos, const glm::vec3& size) {
UVRegion fullRegion (0, 0, 1, 1);
addPlane(pos+Z*size, X*size, Y*size, Z, fullRegion);