MA BOI ROTATED I'M CRYING

3 files changed, 18 insertions, 2 deletions

diff --git a/Tupfile b/Tupfile
index 056357d..91997c7 100644
--- a/Tupfile
+++ b/Tupfile
@@ -1,7 +1,7 @@
 CC       = gcc
 LD       = $(CC) -fuse-ld=mold
 CFLAGS   = -std=c99 -Wall -Wextra -Iglad -Isrc -Istb -DSTBI_ONLY_JPG=
-LDFLAGS  = -lm -lGL -lglfw
+LDFLAGS  = -lcglm -lm -lGL -lglfw
 
 .gitignore
 : foreach src/*.glsl |> cembed -z -s %f >%o |> build/src/embed_%B.c
diff --git a/src/main.c b/src/main.c
index b46095d..d8400ee 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2,6 +2,7 @@
 #include "texture.h"
 #include <glad/glad.h>
 #include <GLFW/glfw3.h>
+#include <cglm/cglm.h>
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -10,6 +11,12 @@ extern unsigned char src_fragment_glsl[];
 
 static void framebuffer_size_callback(GLFWwindow *window, int w, int h);
 
+static float
+radians(float x)
+{
+	return x * 0.01745329f;
+}
+
 int
 main([[maybe_unused]] int argc, [[maybe_unused]] char **argv)
 {
@@ -95,6 +102,10 @@ main([[maybe_unused]] int argc, [[maybe_unused]] char **argv)
 	const GLint vertex_color_location =
 	    shader_uniform_location(&shader, "ourColor");
 
+	mat4 trans = GLM_MAT4_IDENTITY_INIT;
+	glm_rotate(trans, radians(90), (vec3){0.0f, 0.0f, 1.0f});
+	glm_scale(trans, (vec3){0.5f, 0.5f, 0.5f});
+
 	//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, GL_LINEAR);
@@ -106,6 +117,9 @@ main([[maybe_unused]] int argc, [[maybe_unused]] char **argv)
 		            !(r&1), !(r&2), !(r&4), !(r&8));
 		glUniform1i(shader_uniform_location(&shader, "texture0"), 0);
 		glUniform1i(shader_uniform_location(&shader, "texture1"), 1);
+		glUniformMatrix4fv(shader_uniform_location(&shader,
+		                                           "transform"),
+		                   1, GL_FALSE, trans[0]);
 		glActiveTexture(GL_TEXTURE0);
 		glBindTexture(GL_TEXTURE_2D, texture.id);
 		glActiveTexture(GL_TEXTURE1);
diff --git a/src/vertex.glsl b/src/vertex.glsl
index ec813d4..bad790f 100644
--- a/src/vertex.glsl
+++ b/src/vertex.glsl
@@ -6,10 +6,12 @@ layout (location = 2) in vec2 aTexCoord;
 out vec4 vertexColor;
 out vec2 texCoord;
 
+uniform mat4 transform;
+
 void
 main()
 {
-	gl_Position = vec4(aPos, 1.0);
+	gl_Position = transform * vec4(aPos, 1.0);
 	vertexColor = vec4(aColor, 1.0);
 	texCoord = aTexCoord;
 }