pctm + foundation for obj models

This commit is contained in:
2026-02-22 14:32:52 +01:00
parent 7ca48a5080
commit c051008287
16 changed files with 279 additions and 185 deletions
+26 -7
View File
@@ -1,6 +1,8 @@
#ifndef DELTA_MATH
#define DELTA_MATH
#include <vector>
class DeltaVector2 {
public:
float x, y;
@@ -35,9 +37,6 @@ class DeltaVector3 {
float length() const;
};
float getDeterminant(const DeltaVector2 &pointA, const DeltaVector2 &pointB, const DeltaVector2 &candidate);
DeltaVector2 barycentricToScreen(const DeltaVector3 &baryPoint, const DeltaVector2 &a, const DeltaVector2 &b, const DeltaVector2 &c);
DeltaVector3 intersect(DeltaVector3 a, DeltaVector3 b, float nearZ);
struct DeltaTriangle {
DeltaVector3 a, b, c;
@@ -47,14 +46,34 @@ struct DeltaTriangle2D {
DeltaVector2 a, b, c;
};
struct DeltaRenderTriangle {
DeltaVector3 a, b, c;
DeltaVector2 uva, uvb, uvc;
struct DeltaVertex {
DeltaVector3 pos;
DeltaVector2 uv;
};
struct DeltaModelConnector {
int ind1, ind2;
};
struct DeltaRenderTriangle {
DeltaVertex a, b, c;
bool invert;
};
struct DeltaModel {
std::vector<DeltaVertex> vertexes;
std::vector<DeltaModelConnector> lines;
std::vector<DeltaRenderTriangle> triangles;
};
float getDeterminant(const DeltaVector2 &pointA, const DeltaVector2 &pointB, const DeltaVector2 &candidate);
DeltaVector2 barycentricToScreen(const DeltaVector3 &baryPoint, const DeltaVector2 &a, const DeltaVector2 &b, const DeltaVector2 &c);
DeltaVertex intersect(DeltaVertex a, DeltaVertex b, float nearZ);
int clipTriangleAgainstNearPlane(float nearY, const DeltaRenderTriangle &in, DeltaRenderTriangle &out1, DeltaRenderTriangle &out2);
std::vector<DeltaTriangle2D> triangulatePolygon(std::vector<DeltaVertex>& points);
uint32_t SDLColorToUint32(SDL_Color color);
#endif