a-game

commit 086772f2a33920ccb5fee0cf7f95a4d02d49234b
parent 8d9821e849317797b3b60a629b8578c4a841eb9c
Author: amin <dev@aminmesbah.com>
Date:   Thu, 18 Apr 2019 20:16:24 +0000

Render everything with the same projection matrix

FossilOrigin-Name: d458635f11ec1b4f553fe6a21723fddaa9fccf8cfd79180303adc25722217024
Diffstat:
M
src/game.c
 | 
30
++++++++++++++++++++++++++----

1 file changed, 26 insertions(+), 4 deletions(-)
diff --git a/src/game.c b/src/game.c
@@ -112,6 +112,9 @@ void game_update_and_render(struct GameMemory *game_memory, struct GameInput *ga
 
     //glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
 
+    // Screen origin is in the upper left
+    m4 projection = glmth_projection_ortho(0.0f, framebuffer.width, framebuffer.height, 0.0f, -1.0f, 0.0f);
+
     // render tiles
     {
         glBindVertexArray(game_state->tiles.vao);
@@ -159,7 +162,6 @@ void game_update_and_render(struct GameMemory *game_memory, struct GameInput *ga
                 }
                 shader_setv3(&game_state->tiles.shader, "color", &color);
 
-                m4 projection = glmth_projection_ortho(0.0f, framebuffer.width, framebuffer.height, 0.0f, -1.0f, 0.0f);
                 shader_setm4(&game_state->tiles.shader, "projection", &projection);
 
                 glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
@@ -190,8 +192,8 @@ void game_update_and_render(struct GameMemory *game_memory, struct GameInput *ga
         {
             game_state->player.pos.x += movement_speed;
         }
-        glmth_clamp(&(game_state->player.pos.x), 0, ROOM_TILE_DIM_X);
-        glmth_clamp(&(game_state->player.pos.y), 0, ROOM_TILE_DIM_Y);
+        //glmth_clamp(&(game_state->player.pos.x), 0, ROOM_TILE_DIM_X);
+        //glmth_clamp(&(game_state->player.pos.y), 0, ROOM_TILE_DIM_Y);
     }
 
     // render player
@@ -205,15 +207,35 @@ void game_update_and_render(struct GameMemory *game_memory, struct GameInput *ga
         v2 player_dim = { 0.375f, 0.583f };
 
         m4 model = glmth_m4_init_id();
+        model = glmth_translate(model, (v3) {0.0f, framebuffer.height, 0.0f});
+        model = glmth_scale(model, (v3) {1.0f, -1.0f, 1.0f});
         model = glmth_translate(model, (v3) { viewport.min.x, viewport.min.y, 0.0f });
         model = glmth_translate(model, (v3) { player.pos.x * ppm, player.pos.y * ppm, 0.0f });
         model = glmth_scale(model, (v3) { player_dim.x * ppm, player_dim.y * ppm, 1.0f });
         shader_setm4(&game_state->tiles.shader, "model", &model);
 
+        {
+            printf("Framebuffer :");
+            glmth_v2_print((v2) {framebuffer.width, framebuffer.height});
+            printf("Viewport min:");
+            glmth_v2_print(viewport.min);
+            printf("Viewport max:");
+            glmth_v2_print(viewport.max);
+            printf("World       :");
+            glmth_v2_print(game_state->player.pos);
+            // TODO: Why does screen get larger than the framebuffer dimensions?
+            v4 screen = glmth_m4v4_m(model, (v4) {player.pos.x, player.pos.y, 0.0f, 1.0f});
+            printf("Screen      :");
+            glmth_v2_print((v2) {screen.x, screen.y});
+            v4 ndc = glmth_m4v4_m(projection, screen);
+            // TODO: Why isn't NDC between -1.0 an 1.0?
+            printf("NDC         :");
+            glmth_v2_print((v2) {ndc.x, ndc.y});
+        }
+
         v3 color = (v3) { 1.0f, 0.0f, 1.0f };
         shader_setv3(&game_state->tiles.shader, "color", &color);
 
-        m4 projection = glmth_projection_ortho(0.0f, framebuffer.width, 0.0f, framebuffer.height, -1.0f, 0.0f);
         shader_setm4(&game_state->tiles.shader, "projection", &projection);
 
         glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);