matrix debug string stuff

engine/include/libgba-sprite-engine/matrixfx.h

@@ -9,6 +9,8 @@
 #include <libgba-sprite-engine/math.h>
 #include <libgba-sprite-engine/vectorfx.h>
 
+#include <cstdio>
+
 #ifdef CODE_COMPILED_AS_PART_OF_TEST
     #include <libgba-sprite-engine/gba/tonc_math_stub.h>
     #else
@@ -19,6 +21,13 @@ class MatrixFx {
 private:
     FIXED m[MATRIX_DIMENSION];
 
+    inline std::string mstr(int index) {
+        char buffer[30];
+        snprintf(buffer, 30, "%4.3f", rnd(fx2float(m[index])));
+        std::string strObj4(buffer);
+        return strObj4;
+    }
+
 public:
 
     inline static MatrixFx zero() { return MatrixFx(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0); }
@@ -96,6 +105,18 @@ public:
         m[14] = m43;
         m[15] = m44;
     }
+    std::string to_string_m1() {
+        return "(" + mstr(0) + "," + mstr(1) + "," + mstr(2) + "," + mstr(3) +")";
+    }
+    std::string to_string_m2() {
+        return "(" + mstr(4) + "," + mstr(5) + "," + mstr(6) + "," + mstr(7) +")";
+    }
+    std::string to_string_m3() {
+        return "(" + mstr(8) + "," + mstr(9) + "," + mstr(10) + "," + mstr(11) +")";
+    }
+    std::string to_string_m4() {
+        return "(" + mstr(12) + "," + mstr(13) + "," + mstr(14) + "," + mstr(15) +")";
+    }
 
     inline static VectorFx transformCoordinates(const VectorFx &vector, const MatrixFx &transformation) {
         FIXED x = fxmul(vector.x(), transformation.mAt(0)) + fxmul(vector.y(), transformation.mAt(4)) + fxmul(vector.z(), transformation.mAt(8) + transformation.mAt(12));

engine/src/gba_engine.cpp

@@ -172,12 +172,17 @@ void GBAEngine::render() {
         auto worldMatrix = MatrixFx::rotationYawPitchRoll(mesh->roty(), mesh->rotx(), mesh->rotz()) * MatrixFx::translation(mesh->position());
         auto transformMatrix = worldMatrix * viewMatrix * projectionMatrix;
 
+        TextStream::instance().setText(transformMatrix.to_string_m1(), 1, 1);
+        TextStream::instance().setText(transformMatrix.to_string_m2(), 2, 1);
+        TextStream::instance().setText(transformMatrix.to_string_m3(), 3, 1);
+        TextStream::instance().setText(transformMatrix.to_string_m4(), 4, 1);
+
         int i = 0;
         for(auto& vertex : mesh->vertices()) {
             auto projectedPoint = project(*vertex.get(), transformMatrix).toInt();
             plotPixel(projectedPoint.x(), projectedPoint.y(), 1);
 
-            TextStream::instance().setText(std::to_string(i) + ":" + projectedPoint.to_string(), i, 1);
+            //TextStream::instance().setText(std::to_string(i) + ":" + projectedPoint.to_string(), i, 1);
             i++;
         }
     }