emer
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15f90efb1a
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8ed29aa8d4
2
Makefile
2
Makefile
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@ -1,5 +1,5 @@
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CC = gcc #Set compiler
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CFLAGS = -pg -g -Wall -O3 -pg #set compiler flags
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CFLAGS = -pg -g -Wall -O3 #set compiler flags
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LDFLAGS = -pg -g #set linker flags
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LDLIBS = -lraylib -lm #set libraries to use
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objects = c3d.o reader.o arrayfuncs.o vecfunc.o #list all object files
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47
c3d.c
47
c3d.c
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@ -179,6 +179,16 @@ void V2Print(Vector2 v) {
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printf("%f, %f\n", v.x, v.y);
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}
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Vector2 GetUVFromTriAndBary(Vector3 bary, Tri2D * tri, float z){
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Vector2 ta = Vector2Scale(tri->auv, (1.0 / tri->adepth ));
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Vector2 tb = Vector2Scale(tri->buv, (1.0 / tri->bdepth ));
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Vector2 tc = Vector2Scale(tri->cuv, (1.0 / tri->cdepth ));
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Vector2 AB = Vector2Add( Vector2Scale(ta, bary.x), Vector2Scale(tb, bary.y)) ;
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Vector2 ABC = Vector2Add(AB, Vector2Scale(tc, bary.z));
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return Vector2Scale(ABC, z);
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}
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void DrawScanline(Zee *zee, Tri2D *trianglepointer, double start, double end, int scanline) {
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float depth = 0;
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Vector2 UVpos;
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@ -192,17 +202,16 @@ void DrawScanline(Zee *zee, Tri2D *trianglepointer, double start, double end, in
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/* V2Print(UVRangeTri.b); */
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/* V2Print(UVRangeTri.c); */
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Vector3 f1baryatpoint = Tri2DBaryAtPoint(trianglepointer, (Vector2){Max(start, 0), scanline});
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Vector3 f1baryatpoint2 =
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Tri2DBaryAtPoint(trianglepointer, (Vector2){Max(start, 0) + 1, scanline});
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Vector2 tex1point = BaryAndTritoPoint(&UVRangeTri, f1baryatpoint);
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Vector2 tex2point = BaryAndTritoPoint(&UVRangeTri, f1baryatpoint2);
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double f1invdepth = InvDepthAtBary(trianglepointer, f1baryatpoint);
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double f1invdepth2 = InvDepthAtBary(trianglepointer, f1baryatpoint2);
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Vector2 tex1point = GetUVFromTriAndBary(f1baryatpoint, trianglepointer, 1.0 / f1invdepth);
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Vector2 tex2point = GetUVFromTriAndBary(f1baryatpoint2, trianglepointer, 1.0 / f1invdepth2);
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double dinvslope = f1invdepth2 - f1invdepth; // change in store_depth per pixel
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@ -212,15 +221,16 @@ void DrawScanline(Zee *zee, Tri2D *trianglepointer, double start, double end, in
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// UNCOMMENT TO DO TRUE NON SLOPE BASED DEPTH CALC:
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//Vector3 baryatpoint = Tri2DBaryAtPoint(trianglepointer, ( (Vector2){i, scanline}));
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depth = 1.0 / (f1invdepth + (dinvslope * ((float)i - (float)(Max(start, 0)))));
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//depth = 1.0 / InvDepthAtBary(trianglepointer, baryatpoint);
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//UNCOMMENT TO DO REAL UV CALC
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//UVpos = BaryAndTritoPoint(&UVRangeTri, baryatpoint);
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//UVpos = GetUVFromTriAndBary(baryatpoint, trianglepointer, depth);
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//V2Print(UVpos);
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UVpos = Vector2Add(tex1point, Vector2Scale(UVSlope, ((float)i - (float)(Max(start, 0)))));
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depth = 1.0 / (f1invdepth + (dinvslope * ((float)i - (float)(Max(start, 0)))));
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if (depth < zee[IndexOfZBuff(i, scanline)].depth) {
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CMaterial *mat = trianglepointer->material;
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@ -340,6 +350,22 @@ void FillBottomFlatZbuffer(Zee *zee, Tri2D *t, Tri2D *tp) {
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/* } */
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void AnotateTri(Tri2D *tex) {
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char linea[500];
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char lineb[500];
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char linec[500];
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sprintf(linea, "UV: %f, %f;", tex->auv.x, tex->auv.y);
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sprintf(lineb, "UV: %f, %f;", tex->buv.x, tex->buv.y);
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sprintf(linec, "UV: %f, %f;", tex->cuv.x, tex->cuv.y);
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DrawText(linea, tex->a.x, tex->a.y, 60, WHITE);
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DrawText(lineb, tex->b.x, tex->b.y, 60, WHITE);
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DrawText(linec, tex->c.x, tex->c.y, 60, WHITE);
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}
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//the issues is the tt pointer changes, so the thing does not reference properly for debugging
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void DrawTriZuff(Zee *zbuf, Tri2D *tex) {
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Tri2D tt = *tex;
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@ -353,6 +379,8 @@ void DrawTriZuff(Zee *zbuf, Tri2D *tex) {
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Vector2Integate(&t->b);
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Vector2Integate(&t->c);
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//AnotateTri(tex);
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CMaterial *mat = tex->material;
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/* int y = (int) UVpos.y % mat->h; // keep within range because of bug */
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/* int x = (int) UVpos.x % mat->w; */
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@ -453,6 +481,12 @@ void CtrlLocalCam(LocalCam *cam, float time) {
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if (IsKeyDown(KEY_E)) {
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cam->angleVelocity.y = cam->angleVelocity.y - time * 30;
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}
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if (IsKeyDown(KEY_R)) {
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cam->angleVelocity.x = cam->angleVelocity.x + time * 30;
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}
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if (IsKeyDown(KEY_F)) {
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cam->angleVelocity.x = cam->angleVelocity.x - time * 30;
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}
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if (IsKeyDown(KEY_G)) {
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printf("PosX: %f PosY: %f PosZ: %f\n", cam->position.x, cam->position.y, cam->position.z);
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@ -606,7 +640,7 @@ int main() {
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bool run3d = true;
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Object3D t = ReadObjectFromFile("mario.obj");
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Object3D t = ReadObjectFromFile("IronMan.obj");
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if (true) {
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for (int i = 0; i < t.triangles->length; i++) {
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// printf("t: %f\n", t.triangles->arr[i].a.x);
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@ -643,6 +677,8 @@ int main() {
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ZBuff[i].depth = 10000000;
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}
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BeginTextureMode(uiraylibtexture);
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ClearBackground(BLANK);
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for (int i = 0; i < Tri2Darr.length; i++) {
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DrawTriZuff(ZBuff, &Tri2Darr.arr[i]);
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}
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@ -686,7 +722,6 @@ int main() {
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/* } */
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/* } */
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BeginTextureMode(uiraylibtexture);
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// gui stuff
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EndTextureMode();
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9
reader.c
9
reader.c
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@ -27,6 +27,7 @@ CMaterial NewCmat(char *matname, char *fname) {
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strncpy(cmat.name, matname, 15);
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strncpy(cmat.texturefile, fname, 15);
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Image teximg = LoadImage(fname);
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ImageFlipVertical(&teximg);
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cmat.h = teximg.height;
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cmat.w = teximg.width;
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cmat.tex = LoadImageColors(teximg);
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@ -92,18 +93,18 @@ CMaterial * FindCmat(CMaterialArray * cmats, char * name){
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Object3D ReadObjectFromFile(char *fname) {
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Object3D out;
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Vector3 *VertexArray = malloc(10000 * sizeof(Vector3));
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Vector3 *VertexArray = malloc(1000000 * sizeof(Vector3));
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int VertexArrayLength = 0;
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Vector2 *UVArray = malloc(10000 * sizeof(Vector2));
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Vector2 *UVArray = malloc(1000000 * sizeof(Vector2));
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int UVArrayLength = 0;
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TriArray * tarr = malloc(sizeof(TriArray));
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tarr->arr = malloc(10000 * sizeof(Tri));
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tarr->arr = malloc(1000000 * sizeof(Tri));
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tarr->length = 0;
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CMaterialArray * cmats = malloc(sizeof(CMaterialArray));
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cmats->arr = malloc(50 * sizeof(CMaterial));
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cmats->arr = malloc(500 * sizeof(CMaterial));
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cmats->length = 0;
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out.triangles = tarr;
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12
singletri.mtl
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12
singletri.mtl
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@ -0,0 +1,12 @@
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# Blender 4.2.0 MTL File: 'singletri.blend'
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# www.blender.org
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newmtl Material.001
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Ns 250.000000
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Ka 1.000000 1.000000 1.000000
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Ks 0.500000 0.500000 0.500000
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Ke 0.000000 0.000000 0.000000
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Ni 1.500000
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d 1.000000
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illum 2
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map_Kd /home/inventorx/Downloads/0.png
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36
singletri.obj
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36
singletri.obj
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@ -0,0 +1,36 @@
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# Blender 4.2.0
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# www.blender.org
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mtllib singletri.mtl
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o Cube
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v -1.000000 -1.000000 1.000000
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v -1.000000 1.000000 1.000000
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v -1.000000 -1.000000 -1.000000
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v -1.000000 1.000000 -1.000000
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v 1.000000 -1.000000 1.000000
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v 1.000000 1.000000 1.000000
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v 1.000000 -1.000000 -1.000000
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v 1.000000 1.000000 -1.000000
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vn -1.0000 -0.0000 -0.0000
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vn -0.0000 -0.0000 -1.0000
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vn 1.0000 -0.0000 -0.0000
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vn -0.0000 -0.0000 1.0000
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vn -0.0000 -1.0000 -0.0000
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vn -0.0000 1.0000 -0.0000
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vt 0.000000 1.000000
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vt 1.000000 0.000000
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vt 0.000000 0.000000
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vt 1.000000 1.000000
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s 0
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usemtl Material.001
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f 2/1/1 3/2/1 1/3/1
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f 4/1/2 7/2/2 3/3/2
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f 8/4/3 5/3/3 7/2/3
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f 6/4/4 1/3/4 5/2/4
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f 7/4/5 1/3/5 3/1/5
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f 4/1/6 6/2/6 8/4/6
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f 2/1/1 4/4/1 3/2/1
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f 4/1/2 8/4/2 7/2/2
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f 8/4/3 6/1/3 5/3/3
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f 6/4/4 2/1/4 1/3/4
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f 7/4/5 5/2/5 1/3/5
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f 4/1/6 2/3/6 6/2/6
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