fixed perspective, added plane

1 files changed, 11 insertions, 13 deletions

diff --git a/src/o3d/vertex_data.cpp b/src/o3d/vertex_data.cpp
index ea8c5fd..b05e382 100644
--- a/src/o3d/vertex_data.cpp
+++ b/src/o3d/vertex_data.cpp
@@ -2,21 +2,19 @@
 
 using namespace engine::o3d;
 
-VertexData VertexData::lerp(const VertexData& vd1, const VertexData& vd2, float s) {
-    (void) vd1;
-    (void) vd2;
-    (void) s;
-    return {};
+VertexData VertexData::lerp(const VertexData& vd1, const VertexData& vd2, float b0) {
+    return {
+        b0 * vd1.tx + (1.f - b0) * vd2.tx,
+        b0 * vd1.ty + (1.f - b0) * vd2.ty
+    };
 }
 
-VertexData VertexData::bilerp(const VertexData& vd1, const VertexData& vd2, const VertexData& vd3, float s, float t) {
-    (void) vd1;
-    (void) vd2;
-    (void) vd3;
-    (void) s;
-    (void) t;
-    return {};
+VertexData VertexData::bilerp(const VertexData& vd1, const VertexData& vd2, const VertexData& vd3, float b0, float b1) {
+    return {
+        b0 * vd1.tx + b1 * vd2.tx + (1.f - b0 - b1) * vd3.tx,
+        b0 * vd1.ty + b1 * vd2.ty + (1.f - b0 - b1) * vd3.ty
+    };
 }
 
-VertexData::VertexData() {
+VertexData::VertexData(float tx, float ty) : tx{tx}, ty{ty} {
 }