File PolygonLight.cpp

File List > scene > PolygonLight.cpp

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#include "PolygonLight.h"
#include "Camera.h"
#include <numeric>

#include "xdz_math.h"

PolygonLight::PolygonLight(const std::vector<float> &verts, const glm::vec3 &light_color, float light_power, bool use_shadow)
    : verts(verts), light_color{light_color}, light_power{light_power}, use_shadow{use_shadow}
{
    o_type = GO_POLYLIGHT;
    o_name = "Polygonal Light";

    std::vector<GLuint> indexArray = std::vector<GLuint>{0, 1, 2, 0, 2, 3};

    o_vertBuffer = VertexBuffer(this->verts);

    BufferLayout layout;
    layout.Push<float>(2); // 2D position

    o_vertArray.AddBuffer(o_vertBuffer, layout);

    o_index = IndexBuffer(indexArray.data(), indexArray.size() * sizeof(GLuint));

    SetPolygonShader();
}

void PolygonLight::RenderPolygon(const Context& ctx)
{
    const Camera* cam = dynamic_cast<const Camera*>(ctx.scene.GetActiveCamera());
    const bool is_selected = ctx.editor.selections.IsSelected(this);

    o_vertArray.Bind();
    o_index.Bind();
    o_shader.UseShader();

    if (o_shader.is_shader_changed)
        o_shader.InitShader();

    if(is_Uniform_changed || o_shader.is_shader_changed)
        o_shader.SetValue("U_obj_trans", o_Transform);

    if (cam->is_invUniform_changed || o_shader.is_shader_changed)
        o_shader.SetValue("U_cam_trans", cam->o_InvTransform);

    if(cam->is_frustum_changed || o_shader.is_shader_changed)
        o_shader.SetValue("U_ProjectM", cam->cam_frustum);

    if(cam->is_Uniform_changed || cam->is_frustum_changed || o_shader.is_shader_changed)
        o_shader.SetValue("Scene_data", 8, cam->cam_floatData.data(), VEC1_ARRAY);

    o_shader.SetValue("is_selected", (int)is_selected);

    glDrawElements(GL_TRIANGLES, o_index.Count(), GL_UNSIGNED_INT, nullptr);

    o_index.Unbind();
    o_shader.UnuseShader();
    o_vertArray.Unbind();
}

void PolygonLight::SetPolygonShader()
{
    o_shader = RenderShader("Polygon");
    o_shader.UseShader();

    o_shader.InitShader = [&] {
        o_shader.UseShader();

        o_shader.SetValue("light_color", light_color);
        o_shader.SetValue("blen", 0.5f);
        o_shader.SetValue("RAND_color", xdzm::get_random_color(GetObjectID()));
        o_shader.SetValue("ID_color", xdzm::get_id_color(GetObjectID()));

        o_shader.UnuseShader();
    };
}