From 3147e6e9a54f5e56a016625bacdd91c543662183 Mon Sep 17 00:00:00 2001 From: InventorXtreme Date: Tue, 12 Mar 2024 15:27:45 -0400 Subject: [PATCH] t --- Makefile | 2 +- c3d.c | 91 ++++++++++++++++++++++++------------------------------ c3dtypes.h | 1 + 3 files changed, 43 insertions(+), 51 deletions(-) diff --git a/Makefile b/Makefile index 8a8a46a..1e4112f 100644 --- a/Makefile +++ b/Makefile @@ -1,5 +1,5 @@ CC = clang #Set compiler -CFLAGS = -pg -g -Wall -O2 -pg #set compiler flags +CFLAGS = -pg -g -Wall -O3 -pg #set compiler flags LDFLAGS = -pg -g #set linker flags LDLIBS = -lraylib -lm #set libraries to use objects = c3d.o reader.o arrayfuncs.o vecfunc.o #list all object files diff --git a/c3d.c b/c3d.c index f13f10f..442685d 100644 --- a/c3d.c +++ b/c3d.c @@ -118,36 +118,32 @@ void Tri2DSortByY(Tri2D *t) { } } +void DrawScanline(Zee *zee, Tri2D *trianglepointer, double start, double end, int scanline) { -void DrawScanline(Zee * zee, Tri2D * trianglepointer, double start, double end, int scanline) { - - Vector3 f1baryatpoint = Tri2DBaryAtPoint(trianglepointer, (Vector2){Max(start, 0), scanline}); - float f1depth = DepthAtBary(trianglepointer, f1baryatpoint); + Vector3 f1baryatpoint = Tri2DBaryAtPoint(trianglepointer, (Vector2){Max(start, 0), scanline}); + float f1depth = DepthAtBary(trianglepointer, f1baryatpoint); - Vector3 f1baryatpoint2 = Tri2DBaryAtPoint(trianglepointer, (Vector2){Max(start, 0) + 1, scanline}); - float f1depth2 = DepthAtBary(trianglepointer, f1baryatpoint2); - float dslope = f1depth2 - f1depth; + Vector3 f1baryatpoint2 = + Tri2DBaryAtPoint(trianglepointer, (Vector2){Max(start, 0) + 1, scanline}); + float f1depth2 = DepthAtBary(trianglepointer, f1baryatpoint2); + float dslope = f1depth2 - f1depth; - for (int i = Max(start, 0); i < Min(end, RENDERWIDTH); i++) { - /* zee[IndexOfZBuff(i, scanline)].triangle = tp; */ + for (int i = Max(start, 0); i < Min(end, RENDERWIDTH); i++) { + /* zee[IndexOfZBuff(i, scanline)].triangle = tp; */ - /* Vector3 baryatpoint = Tri2DBaryAtPoint(tp, (Vector2){i, scanline}); */ - /* float depth = DepthAtBary(tp, baryatpoint); */ + /* Vector3 baryatpoint = Tri2DBaryAtPoint(tp, (Vector2){i, scanline}); */ + /* float depth = DepthAtBary(tp, baryatpoint); */ - + float aproxdepth = f1depth + (dslope * ((float)i - (float)(Max(start, 0)))); - float aproxdepth = f1depth + (dslope * ((float)i - (float)(Max(start, 0)))); - - - if (aproxdepth > zee[IndexOfZBuff(i, scanline)].depth) { - - zee[IndexOfZBuff(i, scanline)].c = trianglepointer->color; - zee[IndexOfZBuff(i, scanline)].depth = aproxdepth; - } - } + if (aproxdepth > zee[IndexOfZBuff(i, scanline)].depth) { + zee[IndexOfZBuff(i, scanline)].c = trianglepointer->color; + zee[IndexOfZBuff(i, scanline)].depth = aproxdepth; + zee[IndexOfZBuff(i, scanline)].tri = trianglepointer; + } + } } - // Draws triangle with a flat top. Note A and B must be the top points with C // being the bottom "spike" void FillTopFlatZbuffer(Zee *zee, Tri2D *t, Tri2D *tp) { @@ -168,14 +164,13 @@ void FillTopFlatZbuffer(Zee *zee, Tri2D *t, Tri2D *tp) { double curx1 = t->c.x; double curx2 = t->c.x; - int scanbottom = t->c.y; - int scantop = Max(t->a.y, 0); + int scanbottom = t->c.y; + int scantop = Max(t->a.y, 0); for (int scanline = scanbottom; scanline >= scantop; scanline--) { if (0 <= scanline && scanline < RENDERHEIGHT) { - DrawScanline(zee, tp, curx1, curx2, scanline); - + DrawScanline(zee, tp, curx1, curx2, scanline); } curx1 -= atocslopeinv; // subtract because we are working backwards (reason // why we start with point c in slope equtn) @@ -183,7 +178,6 @@ void FillTopFlatZbuffer(Zee *zee, Tri2D *t, Tri2D *tp) { } } - void PrintTri2D(Tri2D t) { printf("{(TRI2D) A: (%f, %f), B: (%f, %f), C:(%f,%f) }\n ", t.a.x, t.a.y, t.b.x, t.b.y, t.c.x, t.c.y); @@ -209,15 +203,17 @@ void FillBottomFlatZbuffer(Zee *zee, Tri2D *t, Tri2D *tp) { double curx1 = t->a.x; double curx2 = t->a.x; - int scantop = t->a.y; // start must always be the true beging of the triangle, otherwise everything will be offset - int scanbottom = Min(t->c.y, RENDERHEIGHT); // we can stop rendering as soon as it goes off screen + int scantop = t->a.y; // start must always be the true beging of the triangle, otherwise + // everything will be offset + int scanbottom = + Min(t->c.y, RENDERHEIGHT); // we can stop rendering as soon as it goes off screen for (int scanline = scantop; scanline < scanbottom; scanline++) { // TODO: Possibly more optimization possible here, use linear correspondance // for y, not just x to get depth if (0 <= scanline && scanline < RENDERHEIGHT) { - DrawScanline(zee, tp, curx1, curx2, scanline); - } + DrawScanline(zee, tp, curx1, curx2, scanline); + } curx1 += atobslopeinv; curx2 += atocslopeinv; } @@ -258,7 +254,6 @@ void DrawTriZuff(Zee *zbuf, Tri2D *t) { } } - void CtrlLocalCam(LocalCam *cam, float time) { cam->velocity.x = 0; cam->velocity.y = 0; @@ -469,11 +464,11 @@ int main() { Tri2D norm = (Tri2D){(Vector2){500, 50}, (Vector2){0, 0}, (Vector2){250, 500}, 0, 0, 0, GREEN}; bool run3d = true; - Object3D t = ReadObjectFromFile("mario.obj"); - for (int i = 0; i < t.triangles->length; i++){ - //printf("t: %f\n", t.triangles->arr[i].a.x); - TriArrayAppend(&tarr, t.triangles->arr[i]); - } + Object3D t = ReadObjectFromFile("teapot.obj"); + for (int i = 0; i < t.triangles->length; i++) { + // printf("t: %f\n", t.triangles->arr[i].a.x); + TriArrayAppend(&tarr, t.triangles->arr[i]); + } while (!WindowShouldClose() && run3d) { float frametime = GetFrameTime(); CtrlLocalCam(&camera, frametime); @@ -505,6 +500,12 @@ int main() { DrawTriZuff(ZBuff, &Tri2Darr.arr[i]); } + if (IsKeyDown(KEY_H)) { + if (ZBuff[IndexOfZBuff(RENDERWIDTH/2, RENDERHEIGHT/2 )].tri != 0) { + ZBuff[IndexOfZBuff(RENDERWIDTH/2, RENDERHEIGHT/2)].tri->color = RED; + } + } + // FillTopFlatZbuffer(ZBuff, &funners); // FillBottomFlatZbuffer(ZBuff,&funners2); @@ -517,21 +518,11 @@ int main() { int index = 0; for (int y = 0; y < RENDERHEIGHT; y++) { for (int x = 0; x < RENDERWIDTH; x++) { - // int index = (x+y*RENDERWIDTH); - /* Color * c = &ZBuff[x][y].triangle->color; - display[index] = c->r; - display[index+1] = c->g; - display[index+2] = c->b; - display[index+3] = c->a; - */ - //if (ZBuff[IndexOfZBuff(x, y)].triangle != 0 ) { // memset sets this to 0 - // DrawPixel(x,y,ZBuff[x][y].triangle->color); - display[index] = ZBuff[IndexOfZBuff(x, y)].c; - // Zee test = ZBuff[IndexOfZBuff(x,y)]; - // display[index] = test.triangle->color; - //} + if (ZBuff[IndexOfZBuff(x, y)].tri != 0) { + display[index] = ZBuff[IndexOfZBuff(x, y)].tri->color; + } index = index + 1; } } diff --git a/c3dtypes.h b/c3dtypes.h index b5190ac..7f1ac28 100644 --- a/c3dtypes.h +++ b/c3dtypes.h @@ -40,6 +40,7 @@ typedef struct Tri2D Tri2D; struct Zee { int depth; + Tri2D * tri; Color c; }; typedef struct Zee Zee;