port calc_vertice_light

LostArtefacts · Oct 14, 2021 · 4248c60 · 4248c60
1 parent 5b9c160
commit 4248c60
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Showing 4 changed files with 53 additions and 7 deletions.
diff --git a/docs/progress.svg b/docs/progress.svg
diff --git a/docs/progress.txt b/docs/progress.txt
@@ -23,7 +23,7 @@ HWR_VisibleZClip                0x00401A20  0x000000A9  +
 phd_PutPolygons                 0x00401AD0  0x000000F3  *
 S_InsertRoom                    0x00401BD0  0x0000006E  *
 calc_object_vertices            0x00401C40  0x000001B6  +
-calc_vertice_light              0x00401E00  0x00000165  -
+calc_vertice_light              0x00401E00  0x00000165  +
 calc_roomvert                   0x00401F70  0x00000428  -
 phd_RotateLight                 0x004023A0  0x000000CF  +
 phd_PointLight                  ----------  ----------  x

diff --git a/src/3dsystem/3d_gen.c b/src/3dsystem/3d_gen.c
@@ -489,6 +489,50 @@ int16_t *calc_object_vertices(int16_t *obj_ptr)
     return total_clip == 0 ? obj_ptr : NULL;
 }
 
+int16_t *calc_vertice_light(int16_t *obj_ptr)
+{
+    int32_t vertex_count = *obj_ptr++;
+    if (vertex_count > 0) {
+        if (LsDivider) {
+            int32_t xv = (PhdMatrixPtr->_00 * LsVectorView.x
+                          + PhdMatrixPtr->_10 * LsVectorView.y
+                          + PhdMatrixPtr->_20 * LsVectorView.z)
+                / LsDivider;
+            int32_t yv = (PhdMatrixPtr->_01 * LsVectorView.x
+                          + PhdMatrixPtr->_11 * LsVectorView.y
+                          + PhdMatrixPtr->_21 * LsVectorView.z)
+                / LsDivider;
+            int32_t zv = (PhdMatrixPtr->_02 * LsVectorView.x
+                          + PhdMatrixPtr->_12 * LsVectorView.y
+                          + PhdMatrixPtr->_22 * LsVectorView.z)
+                / LsDivider;
+            for (int i = 0; i < vertex_count; i++) {
+                int16_t shade = LsAdder
+                    + ((obj_ptr[0] * xv + obj_ptr[1] * yv + obj_ptr[2] * zv)
+                       >> 16);
+                CLAMP(shade, 0, 0x1FFF);
+                PhdVBuf[i].g = shade;
+                obj_ptr += 3;
+            }
+            return obj_ptr;
+        } else {
+            int16_t shade = LsAdder;
+            CLAMP(shade, 0, 0x1FFF);
+            for (int i = 0; i < vertex_count; i++) {
+                PhdVBuf[i].g = shade;
+            }
+            obj_ptr += 3 * vertex_count;
+        }
+    } else {
+        for (int i = 0; i < -vertex_count; i++) {
+            int16_t shade = LsAdder + *obj_ptr++;
+            CLAMP(shade, 0, 0x1FFF);
+            PhdVBuf[i].g = shade;
+        }
+    }
+    return obj_ptr;
+}
+
 void T1MInject3DSystem3DGen()
 {
     INJECT(0x00401000, phd_GenerateW2V);
@@ -503,6 +547,7 @@ void T1MInject3DSystem3DGen()
     INJECT(0x004019A0, phd_TranslateAbs);
     INJECT(0x00401A20, visible_zclip);
     INJECT(0x00401C40, calc_object_vertices);
+    INJECT(0x00401E00, calc_vertice_light);
     INJECT(0x004023A0, phd_RotateLight);
     INJECT(0x004025D0, phd_InitWindow);
     INJECT(0x004026D0, AlterFOV);

diff --git a/src/3dsystem/3d_gen.h b/src/3dsystem/3d_gen.h
@@ -36,6 +36,7 @@ void phd_PushUnitMatrix();
 void phd_PopMatrix();
 
 int16_t *calc_object_vertices(int16_t *obj_ptr);
+int16_t *calc_vertice_light(int16_t *obj_ptr);
 
 void T1MInject3DSystem3DGen();