Zig build and Loading textures from mtl

Makefile

@@ -1,5 +1,5 @@
-CC = clang #Set compiler
-CFLAGS = -pg -g -Wall -O2 -pg #set compiler flags
+CC = gcc #Set compiler
+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

arrayfuncs.c

@@ -1,3 +1,4 @@
+#include "raylib.h"
 #include "c3dtypes.h"
 
 

arrayfuncs.h

@@ -1,8 +1,7 @@
-#include "c3dtypes.h"
 
 #ifndef ARRAYFUNCS_HEADER
 #define ARRAYFUNCS_HEADER
-
+#include "c3dtypes.h"
 void TriArrayAppend(TriArray *tarr, Tri t);
 
 void Tri2DArrayAppend(Tri2DArray *tarr, Tri2D t);

build.zig

@@ -0,0 +1,27 @@
+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+	const target = b.standardTargetOptions(.{});
+	const optimize = b.standardOptimizeOption(.{});
+	const exe = b.addExecutable(.{
+				.name = "c3d",
+				.target = target,
+				.optimize = optimize,
+});
+	exe.linkLibC();
+	exe.addCSourceFiles(.{
+	.files = &.{ "c3d.c", "arrayfuncs.c", "reader.c", "vecfunc.c"  }
+
+});
+	//exe.linkSystemLibrary("raylib");
+	//exe.installLibraryHeaders(raylib)
+	const raylib_dep = b.dependency("raylib", .{
+		.target = target,
+		.optimize = optimize,
+		.linux_display_backend = .Wayland,
+    });
+	const rlib = raylib_dep.artifact("raylib");
+	exe.linkLibrary(rlib);
+	b.installArtifact(exe);
+
+}

build.zig.zon

@@ -0,0 +1,16 @@
+.{
+	.paths = .{""},
+	.name = "c3d",
+	.version = "0.0.1",
+	.dependencies = .{
+		.raylib =.{
+			.url = "https://github.com/raysan5/raylib/archive/refs/heads/master.tar.gz",
+			.hash = "1220480ba605ef3fad3951565a45fce073c3d6fa506e96822d2e86d7a628ed88ec61",
+
+		}
+
+	}
+
+
+
+}

c3d.c

@@ -1,4 +1,5 @@
 #include "raylib.h"
+#include "c3dtypes.h"
 #include "raymath.h"
 #include "reader.h"
 #include <math.h>
@@ -8,7 +9,6 @@
 #include <string.h>
 
 #include "arrayfuncs.h"
-#include "c3dtypes.h"
 #include "vecfunc.h"
 
 const int RENDERWIDTH = 1920;
@@ -490,7 +490,7 @@ int main() {
     bool run3d = true;
 
     if (true) {
-        Object3D t = ReadObjectFromFile("mario.obj");
+        Object3D t = ReadObjectFromFile("cube.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]);

c3dtypes.h

@@ -1,8 +1,8 @@
-#include "raylib.h"
 
 #ifndef C3DTYPES_HEADER
 #define C3DTYPES_HEADER
 
+#include "raylib.h"
 
 
 
@@ -19,6 +19,7 @@ typedef struct LocalCam LocalCam;
 struct CMaterial {
 	char * name;
 	char * texturefile;
+	Color * tex;
 };
 typedef struct CMaterial CMaterial;
 
@@ -29,7 +30,7 @@ struct Tri {
 
     Color color;
 
-	Material material;
+	CMaterial material;
 	
 	Vector2 auv;
 	Vector2 buv;
@@ -71,6 +72,12 @@ struct TriArray {
 };
 typedef struct TriArray TriArray;
 
+struct CMaterialArray {
+	int length;
+	CMaterial *arr;
+};
+typedef struct CMaterialArray CMaterialArray;
+
 struct Tri2DArray {
     int length;
     Tri2D *arr;
@@ -80,6 +87,7 @@ typedef struct Tri2DArray Tri2DArray;
 struct Object3D {
 	char name[100];
 	TriArray  * triangles;
+	CMaterialArray *mats;
 };
 typedef struct Object3D Object3D;
 

cube.mtl

@@ -0,0 +1,7 @@
+newmtl texture
+Ka 0.0 0.0 0.0
+Kd 0.5 0.5 0.5
+Ks 0.0 0.0 0.0
+Ns 10.0
+illum 2
+map_Kd texture.png

reader.c

@@ -1,5 +1,6 @@
-#include "c3dtypes.h"
 #include "arrayfuncs.h"
+#include "c3dtypes.h"
+#include "raylib.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -18,15 +19,81 @@ Vector3 BreakDownObjTriElement(char * vert) {
     return (Vector3){vertex, vertextexture, normal};
 }
 
+CMaterial NewCmat(char *matname, char *fname) {
+    CMaterial cmat;
+	cmat.name = malloc(20 * sizeof(char));
+	cmat.texturefile = malloc(20 * sizeof(char));
+    strncpy(cmat.name, matname, 15);
+    strncpy(cmat.texturefile, fname, 15);
+    Image teximg = LoadImage(fname);
+    cmat.tex = LoadImageColors(teximg);
+    printf("Loaded Tex %s\n", matname);
+    return cmat;
+}
+
+void LoadMats(char *fname, CMaterialArray *cmats) {
+    FILE *f = fopen(fname, "r");
+
+    char mtlname[50];
+    strncpy(mtlname, "", 50);
+    char mtltex[50];
+    strncpy(mtltex, "", 50);
+	printf("Loading mat of name: %s\n", fname);
+    while (true) {
+        char t[500];
+        char *fgetres = fgets(t, 500, f);
+
+        char objtype[30];
+        char v1[100];
+        char v2[100];
+        char v3[100];
+        sscanf(t, "%s %s %s %s", objtype, v1, v2, v3);
+
+        printf("Entering comp for mtlname: %s, mtltex: %s\n", mtlname, mtltex);
+
+        if (fgetres == NULL) {
+            if ((strcmp(mtlname, "") != 0) && (strcmp(mtltex, "") != 0)) {
+                cmats->arr[cmats->length] = NewCmat(mtlname, mtltex);
+				printf("Younki Sploinky\n");
+                cmats->length = cmats->length + 1;
+                strncpy(mtltex, "", 50);
+                printf("ended and added\n");
+            }
+            break;
+        }
+
+        if (strcmp(objtype, "newmtl") == 0) {
+            if ((strcmp(mtlname, "") != 0) && (strcmp(mtltex, "") != 0)) {
+                cmats->arr[cmats->length] = NewCmat(mtlname, mtltex);
+                cmats->length = cmats->length + 1;
+                strncpy(mtltex, "", 50);
+            }
+            strncpy(mtlname, v1, 50);
+        }
+        if (strcmp(objtype, "map_Kd") == 0) {
+            strncpy(mtltex, v1, 50);
+        }
+    }
+    printf("Loaded Tex %s\n", fname);
+    fclose(f);
+}
+
 Object3D ReadObjectFromFile(char *fname) {
     Object3D out;
     Vector3 *VertexArray = malloc(10000 * sizeof(Vector3));
     int VertexArrayLength = 0;
 
+    Vector2 *UVArray = malloc(10000 * sizeof(Vector2));
+    int UVArrayLength = 0;
+
     TriArray tarr;
     tarr.arr = malloc(10000 * sizeof(Tri));
     tarr.length = 0;
 
+    CMaterialArray cmats;
+    cmats.arr = malloc(10 * sizeof(CMaterial));
+	cmats.length = 0;
+
     out.triangles = &tarr;
 
     strncpy(out.name, fname, 100);
@@ -45,6 +112,9 @@ Object3D ReadObjectFromFile(char * fname) {
         char v2[100];
         char v3[100];
         sscanf(t, "%s %s %s %s", objtype, v1, v2, v3);
+        if (strcmp(objtype, "mtllib") == 0) {
+            LoadMats(v1, &cmats);
+        }
         if (strcmp(objtype, "v") == 0) {
             VertexArray[VertexArrayLength].x = atof(v1) * 100;
             VertexArray[VertexArrayLength].y = atof(v2) * 100;
@@ -52,13 +122,15 @@ Object3D ReadObjectFromFile(char * fname) {
             VertexArrayLength = VertexArrayLength + 1;
         }
         if (strcmp(objtype, "vt") == 0) {
-
+            // printf("vt: (%s,%s)\n", v1, v2);
+            UVArray[UVArrayLength].x = atof(v1);
+            UVArray[UVArrayLength].y = atof(v2);
+            UVArrayLength = UVArrayLength + 1;
         }
         if (strcmp(objtype, "f") == 0) {
             // TODO: append face to triarry
             Tri temptri;
 
-
             temptri.a = VertexArray[atoi(v1) - 1];
             temptri.b = VertexArray[atoi(v2) - 1];
             temptri.c = VertexArray[atoi(v3) - 1];
@@ -71,6 +143,8 @@ Object3D ReadObjectFromFile(char * fname) {
         }
         // need to bring in triarray functions into their own file
     }
+
+    fclose(f);
     printf("Loaded model %s with %d tris\n", fname, tarr.length);
     return out;
 

reader.h

@@ -1,4 +1,4 @@
-#include "c3dtypes.h"
+//#include "c3dtypes.h"
 #ifndef READER_HEADER
 #define READER_HEADER