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#include "SceneThings.hpp"
#include "CommonVertexIndex.hpp"
#include "Rect.hpp"
#include <utility>
SimpleGeometryObject::SimpleGeometryObject(GameWorld* world)
: GameObject(KD_SimpleGeometry, world)
, mRenderObject()
, mSize{ 50.0f, 50.0f, 50 }
, mXFaceColor(kXAxisColor)
, mYFaceColor(kYAxisColor)
, mZFaceColor(kZAxisColor)
, mNeedsRebuildMesh{ true } {
mRenderObject.SetMaterial(gDefaultMaterial.Get());
mRenderObject.SetFormat(gVformatStandard.Get(), Tags::IT_16Bit);
mRenderObject.RebuildIfNecessary();
}
void SimpleGeometryObject::SetSize(glm::vec3 size) {
mSize = size;
mNeedsRebuildMesh = true;
}
void SimpleGeometryObject::SetXFaceColor(RgbaColor color) {
mXFaceColor = color;
mNeedsRebuildMesh = true;
}
void SimpleGeometryObject::SetYFaceColor(RgbaColor color) {
mYFaceColor = color;
mNeedsRebuildMesh = true;
}
void SimpleGeometryObject::SetZFaceColor(RgbaColor color) {
mZFaceColor = color;
mNeedsRebuildMesh = true;
}
std::span<const RenderObject> SimpleGeometryObject::GetRenderObjects() const {
using namespace Tags;
if (mNeedsRebuildMesh) {
mNeedsRebuildMesh = false;
Vertex_PTC vertices[4 /*vertices per face*/ * 6 /*faces*/];
uint16_t indices[3 /*indices per triangle*/ * 2 /*triangles per face*/ * 6 /*faces*/];
auto pos = GetPos();
auto extents = mSize / 2.0f;
int faceGenVerticesIdx = 0;
int faceGenIndicesIdx = 0;
auto GenerateFace = [&](glm::vec3 faceCenter, glm::vec3 firstExtentVec, glm::vec3 secondExtentVec, RgbaColor color) {
// Generates (if viewing top down on the face): bottom left, top left, bottom right, top right
// (-1, -1) , (-1, 1) , (1, -1) , (1, 1)
// idx=0 , idx=1 , idx=2 , idx=3
// These are index offsets, see above comment
constexpr int kBottomLeft = 0;
constexpr int kTopLeft = 1;
constexpr int kBottomRight = 2;
constexpr int kTopRight = 3;
int startVertIdx = faceGenVerticesIdx;
for (float firstDir : { -1, 1 }) {
for (float secondDir : { -1, 1 }) {
auto vertPos = faceCenter + firstExtentVec * firstDir + secondExtentVec * secondDir;
auto& vert = vertices[faceGenVerticesIdx];
vert.x = vertPos.x;
vert.y = vertPos.y;
vert.z = vertPos.z;
vert.r = color.r;
vert.g = color.g;
vert.b = color.b;
vert.a = color.a;
faceGenVerticesIdx += 1;
}
}
// Triangle #1
indices[faceGenIndicesIdx++] = startVertIdx + kTopRight;
indices[faceGenIndicesIdx++] = startVertIdx + kTopLeft;
indices[faceGenIndicesIdx++] = startVertIdx + kBottomLeft;
// Triangle #2
indices[faceGenIndicesIdx++] = startVertIdx + kTopRight;
indices[faceGenIndicesIdx++] = startVertIdx + kBottomLeft;
indices[faceGenIndicesIdx++] = startVertIdx + kBottomRight;
};
for (int xDir : { -1, 1 }) {
float x = pos.x + xDir * extents.x;
GenerateFace(glm::vec3(x, pos.y, pos.z), glm::vec3(0, 0, extents.z), glm::vec3(0, extents.y, 0), mXFaceColor);
}
for (int yDir : { -1, 1 }) {
float y = pos.y + yDir * extents.y;
GenerateFace(glm::vec3(pos.x, y, pos.z), glm::vec3(extents.x, 0, 0), glm::vec3(0, 0, extents.z), mYFaceColor);
}
for (int zDir : { -1, 1 }) {
float z = pos.z + zDir * extents.z;
GenerateFace(glm::vec3(pos.x, pos.y, z), glm::vec3(extents.x, 0, 0), glm::vec3(0, extents.y, 0), mZFaceColor);
}
for (auto& vert : vertices) {
vert.u = 0.0f;
vert.v = 0.0f;
}
mRenderObject.GetVertexBufferBindings().bindings[0]->Upload((const std::byte*)vertices, sizeof(vertices));
mRenderObject.GetIndexBuffer()->Upload((const std::byte*)indices, IT_16Bit, std::size(indices));
}
return { &mRenderObject, 1 };
}
BuildingObject::BuildingObject(GameWorld* world)
: GameObject(KD_Building, world) {
mRenderObject.SetMaterial(gDefaultMaterial.Get());
mRenderObject.SetFormat(gVformatStandard.Get(), Tags::IT_32Bit);
mRenderObject.RebuildIfNecessary();
}
// void BuildingObject::SetMeshMaterial(Material* material) {
// mMaterial.Attach(material);
// // TODO update render
// }
// const Material* BuildingObject::GetMeshMaterial() const {
// return mMaterial.Get();
// }
// void BuildingObject::SetMesh(GpuMesh* mesh) {
// mMesh.Attach(mesh);
// // TODO update render
// }
// const GpuMesh* BuildingObject::GetMesh() const {
// return mMesh.Get();
// }
std::span<const RenderObject> BuildingObject::GetRenderObjects() const {
return { &mRenderObject, 1 };
}
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