Terrain rendering hack

Engine/Graphics/3DRenderer.cpp

@@ -1,5 +1,7 @@
 #include "3DRenderer.hpp"
 
+#include <SFML/Graphics/RectangleShape.hpp>
+
 #include "../World/DbgCube.hpp"
 #include "../World/Tank.hpp"
 
@@ -99,12 +101,33 @@ void Graphic3DRenderer::Draw(sf::RenderTexture& context) {
 
     // Load main matrices
     M3D_MATRIX viewMat = mMainCamera->GetView();
+    M3D_MATRIX invViewMat = M3D_MInverse(viewMat);  // aka. camMat
     M3D_MATRIX projMat = mMainCamera->GetProj();
     M3D_MATRIX viewProjMat = viewMat * projMat;
 
     // Create the frustrum "box"
     M3D_BoundingFrustum camFrustrum(projMat, false);
-    camFrustrum.Transform(camFrustrum, M3D_MInverse(viewMat));
+    camFrustrum.Transform(camFrustrum, invViewMat);
+
+    const float sgRatio = std::tan(mMainCamera->GetLook3f().y);
+    // -= Draw the sky =-
+    // To avoid unfilled pixels on screen, the "sky-plane" will be rendered 
+    // all over the screen.
+    // It's will be useless to use and compute a specific rectangle from the 
+    // size of the screen!
+    // The sky have an infinite z-depth (any objects will be rendered over).
+    context.clear(sf::Color::Cyan);
+
+    // -= Draw the ground =-
+    // A simple rectangle shape is used to draw the ground over the sky-plane.
+    // The ground is draw after the sky, and before any other object.
+    // Depending of the camera pitch, the ratio sky/ground on screen vary.
+    // Like the sky, the ground have an infinite z-depth (any objects will 
+    // be rendered over).
+    sf::RectangleShape gndRect(sf::Vector2f(1280, mRTSize.y * (0.5f - sgRatio)));
+    gndRect.setPosition(sf::Vector2f(0, mRTSize.y * (0.5f + sgRatio)));
+    gndRect.setFillColor(sf::Color::Green);
+    context.draw(gndRect, sRS);
 
     // Process scene's objects
     for (auto& obj : mRenderList) {
@@ -120,7 +143,7 @@ void Graphic3DRenderer::Draw(sf::RenderTexture& context) {
         {
             size_t vCount = obj->GetObjectVerticesCount();
             auto& oMesh = obj->GetObjectMesh();
-            auto* projVertices = new M3D_F4[vCount];
+            M3D_F4 projVertices[vCount] = {};
 
             // Vertices homogeneous clip space transformation
             M3D_V3Transform(
@@ -131,7 +154,7 @@ void Graphic3DRenderer::Draw(sf::RenderTexture& context) {
             );
 
             // Draw the object indice triangles if visible or partially clipped
-            auto* v_tri = new sf::Vertex[4];
+            sf::Vertex v_tri[4];
             for (auto& objPt : oMesh.parts) {
                 auto indicePtr = static_cast<const uint32_t*>(objPt.indices.data());
 
@@ -188,9 +211,6 @@ void Graphic3DRenderer::Draw(sf::RenderTexture& context) {
                     }
                 }
             }
-
-            delete[] v_tri;
-            delete[] projVertices;
         }
     }
 }

Engine/Graphics/Camera.hpp

@@ -15,6 +15,8 @@ public:
 
     M3D_VECTOR GetPos() const { return M3D_V4LoadF3(&mPos); }
     M3D_F3 GetPos3f() const { return mPos; }
+    M3D_VECTOR GetLook() const { return M3D_V4LoadF3(&mLook); }
+    M3D_F3 GetLook3f() const { return mLook; }
     M3D_MATRIX GetView() const { return M3D_V4LoadF4x4(&mViewMat); }
     const M3D_F4X4& GetView4x4f() const { return mViewMat; }
     M3D_MATRIX GetProj() const { return M3D_V4LoadF4x4(&mProjMat); }

Engine/Utils/3DMaths.hpp

@@ -555,7 +555,7 @@ M3D_MATRIX M3D_MMultiply(M3D_MATRIX M1, M3D_MATRIX& M2) noexcept;
 M3D_MATRIX M3D_MTranspose(M3D_MATRIX M) noexcept;
 M3D_MATRIX M3D_MInverse(M3D_MATRIX M) noexcept;
 
-M3D_VECTOR M3D_QRotationMatrix(M3D_MATRIX M) noexcept;
+M3D_VECTOR M3D_QRotationFromMatrix(M3D_MATRIX M) noexcept;
 
 
 //

Engine/Utils/3DMaths_bs.inl

@@ -178,7 +178,7 @@ INLINE_AVX_FIX void M3D_BoundingFrustum::Transform(M3D_BoundingFrustum& Out, M3D
     nM.rows[1] = M3D_V3Normalize(M.rows[1]);
     nM.rows[2] = M3D_V3Normalize(M.rows[2]);
     nM.rows[3] = M3D_MIdentityR3;
-    M3D_VECTOR Rotation = M3D_QRotationMatrix(nM);
+    M3D_VECTOR Rotation = M3D_QRotationFromMatrix(nM);
     vOrientation = M3D_QMultiply(vOrientation, Rotation);
 
     // Transform the center.

Engine/Utils/3DMaths_mat.inl

@@ -591,7 +591,7 @@ INLINE_AVX_FIX M3D_MATRIX M3D_MInverse(M3D_MATRIX M) noexcept {
 
 /* -------------------------------------------------------------------------------------------------------------------------- */
 
-INLINE_AVX_FIX M3D_VECTOR M3D_QRotationMatrix(M3D_MATRIX M) noexcept {
+INLINE_AVX_FIX M3D_VECTOR M3D_QRotationFromMatrix(M3D_MATRIX M) noexcept {
 #ifdef DISABLE_INTRINSICS
     M3D_V4F32 q;
     float r22 = M.mat[2][2];