/* * 3D Engine * matrice.c: * Based on pikuma.com 3D software renderer in C * Copyright (c) 2021 986-Studio. All rights reserved. * * Created by Manoƫl Trapier on 06/03/2021. */ #include #include /* Matrix operations */ vec4_t mat4ProdVec4(matrix4_t mat, vec4_t v) { vec4_t ret = { .x = FastGet4(mat, 0, 0) * v.x + FastGet4(mat, 0, 1) * v.y + FastGet4(mat, 0, 2) * v.z + FastGet4(mat, 0, 3) * v.w, .y = FastGet4(mat, 1, 0) * v.x + FastGet4(mat, 1, 1) * v.y + FastGet4(mat, 1, 2) * v.z + FastGet4(mat, 1, 3) * v.w, .z = FastGet4(mat, 2, 0) * v.x + FastGet4(mat, 2, 1) * v.y + FastGet4(mat, 2, 2) * v.z + FastGet4(mat, 2, 3) * v.w, .w = FastGet4(mat, 3, 0) * v.x + FastGet4(mat, 3, 1) * v.y + FastGet4(mat, 3, 2) * v.z + FastGet4(mat, 3, 3) * v.w, }; return ret; } /* Matrix creations */ matrix4_t mat4Scale(double scaleX, double scaleY, double scaleZ) { matrix4_t ret = { scaleX, 0, 0,0, 0, scaleY, 0, 0, 0, 0, scaleZ, 0, 0, 0, 0, 1 }; return ret; } matrix4_t mat4Translate(double tX, double tY, double tZ) { matrix4_t ret = { 1, 0, 0, tX, 0, 1, 0, tY, 0, 0, 1, tZ, 0, 0, 0, 1 }; return ret; } matrix4_t mat4RotationX(double angle) { matrix4_t ret = { 1, 0, 0, 0, 0, cos(angle), -sin(angle), 0, 0, sin(angle), cos(angle), 0, 0, 0, 0, 1 }; return ret; } matrix4_t mat4RotationY(double angle) { matrix4_t ret = { cos(angle), 0, sin(angle), 0, 0, 1, 0, 0, -sin(angle), 0, cos(angle), 0, 0, 0, 0, 1 }; return ret; } matrix4_t mat4RotationZ(double angle) { matrix4_t ret = { cos(angle), -sin(angle), 0, 0, sin(angle), cos(angle), 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 }; return ret; }