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-rw-r--r--main.cpp203
1 files changed, 191 insertions, 12 deletions
diff --git a/main.cpp b/main.cpp
index eb8f117..732588a 100644
--- a/main.cpp
+++ b/main.cpp
@@ -5,6 +5,7 @@
#include <vector>
#include <SDL2/SDL.h>
#include "chfb.h"
+#include "pixfb.h"
#include "obj3d.h"
#include "math_vector.h"
#include "vertex.h"
@@ -277,21 +278,199 @@ void main_SDL() {
}
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STREAMING, SCREEN_WIDTH, SCREEN_HEIGHT);
- std::vector<uint32_t> pixels(SCREEN_WIDTH * SCREEN_HEIGHT);
- for (int y = 0; y < SCREEN_HEIGHT; y++) {
- for (int x = 0; x < SCREEN_WIDTH; x++) {
- pixels[x + y * SCREEN_WIDTH] = ((uint32_t) (x + y * SCREEN_WIDTH) << 8) | 0xFF;
- }
- }
- SDL_UpdateTexture(texture, NULL, pixels.data(), SCREEN_WIDTH * 4);
- SDL_RenderClear(renderer);
- SDL_RenderCopy(renderer, texture, NULL, NULL);
- SDL_RenderPresent(renderer);
- SDL_UpdateWindowSurface(window);
+ PixelFrameBuffer pfb{SCREEN_WIDTH, SCREEN_HEIGHT};
+
+ MathVector3 a{0.f, 0.f, 0.f};
+ float dist = 4.f;
SDL_Event e;
bool quit = false;
while (!quit) {
- while (SDL_PollEvent(&e)) {
+ a.x += .0050f;
+ a.y += .0065f;
+ a.z += .0080f;
+
+ float rad = 5.f;
+ MathVector3 ca{std::cos(a.x), std::cos(a.y), std::cos(a.z)};
+ MathVector3 sa{std::sin(a.x), std::sin(a.y), std::sin(a.z)};
+
+ std::array<MathVector3, 3> rot_x = {{
+ { 1.f, 0.f, 0.f },
+ { 0.f, ca.x, sa.x },
+ { 0.f, -sa.x, ca.x },
+ }};
+ std::array<MathVector3, 3> rot_y = {{
+ { ca.y, 0.f, -sa.y },
+ { 0.f, 1.f, 0.f },
+ { sa.y, 0.f, ca.y },
+ }};
+ std::array<MathVector3, 3> rot_z = {{
+ { ca.z, sa.z, 0.f },
+ { -sa.z, ca.z, 0.f },
+ { 0.f, 0.f, 1.f },
+ }};
+
+ auto [e_x, e_y, e_z] = rot_x;
+ e_x = e_x.x * rot_y[0] + e_x.y * rot_y[1] + e_x.z * rot_y[2];
+ e_y = e_y.x * rot_y[0] + e_y.y * rot_y[1] + e_y.z * rot_y[2];
+ e_z = e_z.x * rot_y[0] + e_z.y * rot_y[1] + e_z.z * rot_y[2];
+ e_x = e_x.x * rot_z[0] + e_x.y * rot_z[1] + e_x.z * rot_z[2];
+ e_y = e_y.x * rot_z[0] + e_y.y * rot_z[1] + e_y.z * rot_z[2];
+ e_z = e_z.x * rot_z[0] + e_z.y * rot_z[1] + e_z.z * rot_z[2];
+
+ std::array<Object3D, 2> objs{{
+ {
+ {
+ {
+ rad * (-e_x + -e_y + -e_z - .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (+e_x + -e_y + -e_z - .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (-e_x + +e_y + -e_z - .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (+e_x + +e_y + -e_z - .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (-e_x + -e_y + +e_z - .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (+e_x + -e_y + +e_z - .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (-e_x + +e_y + +e_z - .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (+e_x + +e_y + +e_z - .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ }
+ },
+ {
+ // face 1
+ { 0, 2, 3 },
+ { 0, 3, 1 },
+
+ // face 2
+ { 0, 4, 6 },
+ { 0, 6, 2 },
+
+ // face 3
+ { 0, 1, 5 },
+ { 0, 5, 4 },
+
+ // face 4
+ { 7, 6, 4 },
+ { 7, 4, 5 },
+
+ // face 5
+ { 7, 3, 2 },
+ { 7, 2, 6 },
+
+ // face 6
+ { 7, 5, 1 },
+ { 7, 1, 3 },
+ }
+ },
+ {
+ {
+ {
+ rad * (-e_x + -e_y + -e_z + .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (+e_x + -e_y + -e_z + .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (-e_x + +e_y + -e_z + .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (+e_x + +e_y + -e_z + .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (-e_x + -e_y + +e_z + .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (+e_x + -e_y + +e_z + .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (-e_x + +e_y + +e_z + .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ },
+ {
+ rad * (+e_x + +e_y + +e_z + .5f * (e_x + e_y + e_z)) - dist * rad * MathVector3{0.f, 0.f, 1.f},
+ {}
+ }
+ },
+ {
+ // face 1
+ { 0, 2, 3 },
+ { 0, 3, 1 },
+
+ // face 2
+ { 0, 4, 6 },
+ { 0, 6, 2 },
+
+ // face 3
+ { 0, 1, 5 },
+ { 0, 5, 4 },
+
+ // face 4
+ { 7, 6, 4 },
+ { 7, 4, 5 },
+
+ // face 5
+ { 7, 3, 2 },
+ { 7, 2, 6 },
+
+ // face 6
+ { 7, 5, 1 },
+ { 7, 1, 3 },
+ }
+ }
+ }};
+ pfb.clear();
+ float min_z = 2.f, max_z = 50.f;
+ float fac_for_aspect_ratio = 2.f * static_cast<float>(pfb.height()) / static_cast<float>(pfb.width());
+ for (auto obj : objs) {
+ for (auto triangle : obj) {
+ TriangleVertex4 t{triangle};
+
+ // should be multiplied by a matrix, temporary replacement
+ t.vertex1.point.x *= fac_for_aspect_ratio;
+ t.vertex1.point.y = -t.vertex1.point.y;
+ t.vertex1.point.w = -t.vertex1.point.z;
+ t.vertex1.point.z = 2.f * (-t.vertex1.point.z - min_z) / (max_z - min_z) - 1.f;
+ t.vertex2.point.x *= fac_for_aspect_ratio;
+ t.vertex2.point.y = -t.vertex2.point.y;
+ t.vertex2.point.w = -t.vertex2.point.z;
+ t.vertex2.point.z = 2.f * (-t.vertex2.point.z - min_z) / (max_z - min_z) - 1.f;
+ t.vertex3.point.x *= fac_for_aspect_ratio;
+ t.vertex3.point.y = -t.vertex3.point.y;
+ t.vertex3.point.w = -t.vertex3.point.z;
+ t.vertex3.point.z = 2.f * (-t.vertex3.point.z - min_z) / (max_z - min_z) - 1.f;
+
+ pfb.draw_triangle(t);
+ }
+ }
+ SDL_UpdateTexture(texture, NULL, pfb.pixels(), SCREEN_WIDTH * 4);
+ SDL_RenderClear(renderer);
+ SDL_RenderCopy(renderer, texture, NULL, NULL);
+ SDL_RenderPresent(renderer);
+ SDL_UpdateWindowSurface(window);
+ while (SDL_WaitEventTimeout(&e, 10)) {
if (e.type == SDL_QUIT) {
quit = true;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-21 13:47:12 +0000