Method drawSphere

src/utils/DebugRenderer.cpp:146–191

Draw a sphere

/// Draw a sphere
void DebugRenderer::drawSphere(const Vector3& position, decimal radius, uint32 color) {

    Vector3 vertices[(NB_SECTORS_SPHERE + 1) * (NB_STACKS_SPHERE + 1) + (NB_SECTORS_SPHERE + 1)];
	
	// Vertices
    const decimal sectorStep = 2 * PI_RP3D / NB_SECTORS_SPHERE;
    const decimal stackStep = PI_RP3D / NB_STACKS_SPHERE;
	
    for (uint32 i = 0; i <= NB_STACKS_SPHERE; i++) {

        const decimal stackAngle = PI_RP3D / 2 - i * stackStep;
		const decimal radiusCosStackAngle = radius * std::cos(stackAngle);
		const decimal z = radius * std::sin(stackAngle);

        for (uint32 j = 0; j <= NB_SECTORS_SPHERE; j++) {
		
			const decimal sectorAngle = j * sectorStep;
			const decimal x = radiusCosStackAngle * std::cos(sectorAngle);
			const decimal y = radiusCosStackAngle * std::sin(sectorAngle);

            vertices[i * (NB_SECTORS_SPHERE + 1) + j] = position + Vector3(x, y, z);
		}
	}

	// Faces
    for (uint32 i = 0; i < NB_STACKS_SPHERE; i++) {

        uint32 a1 = i * (NB_SECTORS_SPHERE + 1);
        uint32 a2 = a1 + NB_SECTORS_SPHERE + 1;

        for (uint32 j = 0; j < NB_SECTORS_SPHERE; j++, a1++, a2++) {
		
			// 2 triangles per sector except for the first and last stacks

			if (i != 0) {
			
				mTriangles.add(DebugTriangle(vertices[a1], vertices[a2], vertices[a1 + 1], color));
			}

			if (i != (NB_STACKS_SPHERE - 1)) {
				
				mTriangles.add(DebugTriangle(vertices[a1 + 1], vertices[a2], vertices[a2 + 1], color));
			}
		}
	}
}

// Draw a capsule
void DebugRenderer::drawCapsule(const Transform& transform, decimal radius, decimal height, uint32 color) {